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No-fault divorce is a divorce in which the dissolution of a marriage does not require a showing of wrongdoing by either party.   Laws providing for no-fault divorce allow a family court to grant a divorce in response to a petition by either party of the marriage without requiring the petitioner to provide evidence that the defendant has committed a breach of the marital contract.
In early modern Europe, Prussia took a pioneering role with Frederick the Great's 1757 edict allowing marriages to be resolved on the ground of serious and continuous hostility between spouses, without pointing to any one guilty party. This early example of no-fault divorce was expanded on and formalized with the 1794 General State Laws for the Prussian States, which allowed childless couples to file for divorce without giving a ground. 
The first modern no-fault divorce law was enacted in Russia in December 1917 following the October Revolution of the same year. Regarding marriage as a bourgeois institution, the new government transferred divorce jurisdiction from the Russian Orthodox Church to the state courts, which could grant it on application of either spouse.   Alimony guarantees under the new regime were weak until a new family code was passed in 1926.  
With a law adopted in 1969, California became the first U.S. state to permit no-fault divorce.  California's law was framed on a roughly contemporaneous effort of the non-governmental organization National Conference of Commissioners on Uniform State Laws, which began drafting a model of no-fault divorce statute for states to consider in 1967. 
Australia established no-fault divorce in 1975, with the only ground for divorce being irretrievable breakdown of marriage, evidenced by a twelve-month separation. Canada effectively permitted no-fault divorce in 1986 by reducing the separation period to one year.
Several studies have looked at the effect of no-fault divorce on divorce rates in the United States. The studies typically find an increase in the short-term rate but little long-term causal relationship. The most frequent explanation given is that the older laws were ineffective and not followed anyway, though there are some differing viewpoints.   Economists Betsey Stevenson and Justin Wolfers, based on findings in their research, argue that domestic violence and female suicide decline in states that legalize no-fault divorce.  Specifically, they report that "states that adopted no-fault divorce experienced a decrease of 8 to 16 percent in wives' suicide rates and a 30 percent decline in domestic violence."  They also argue that their research proves that there is no permanent effect of no-fault divorce laws on divorce rates. 
Stephanie Coontz, a professor of history at Evergreen State College, states that "in the years since no-fault divorce became well-nigh universal, the national divorce rate has fallen, from about 23 divorces per 1,000 married couples in 1979 to under 17 per 1,000 in 2005."  She adds that "once you permit the courts to determine when a person's desire to leave is legitimate, you open the way to arbitrary decisions about what is or should be tolerable in a relationship, made by people who have no stake in the actual lives being lived." 
A 2010 New York Times editorial said that New York was "the only state where a court must find fault before granting a divorce unless the spouses have lived apart for a full year under a formal separation agreement — a proven formula for inviting false testimony, endless litigation and generally making divorce far more painful than it needs to be."  Later that year, New York became the final state to allow no-fault divorce. Lawyer L.M. Fenton states that "Feminist holdouts against New York's new [no-fault divorce] bill don't understand how family law affects women today", adding: "It also mystifies me that spouses could still, even in 2010, be forced to stay married to someone who refused to let go." 
Fault-based grounds usually include mental cruelty, but true mental cruelty has a psychological component that can make it very difficult for the abused spouse to articulate that abuse. More to the point, the abused spouse may be terrified to describe the relationship on paper and testify about it in a court. And of course, a controlling partner will always choose the path of most resistance to whatever it is that the other spouse wants. 
The state adopted no-fault divorce later that year.
The National Organization for Women opposed the introduction of no-fault divorce in New York State because it would allow a party who actually is at fault to obtain a divorce in which "alimony, maintenance [and] property division" would be determined without the judge considering "the facts, behavior and circumstances that led to the break-up of the marriage". 
A paper published in the Harvard Journal of Law and Public Policy, written by Douglas Allen, on the economics of same-sex marriage, argues that the introduction of no-fault divorce led to a six-fold increase in just two years, after a century of rather stable divorce rates. Also, the law increased the rate at which women entered the workforce, increased the number of hours worked in a week, increased the so-called " feminization of poverty," and increased the age at which people married. 
Stephen Baskerville, a political scientist at Patrick Henry College, argues that no-fault divorce rewards wrongdoers, reduces the need of marital binding agreement contracts at the public's expense, and helps women take custody of their children at the husbands' expense in many cases where the man has done nothing wrong. He also adds that a ban on divorce will not work, because people will separate themselves and be in a permanent state of adultery, or they will create a hostile home environment for the children.  
Australia adopted no-fault divorce in 1975 with the enactment of the Family Law Act 1975. The only ground for divorce is irretrievable breakdown of marriage, evidenced by a twelve-month separation. However, a residual "fault" element remains in relation to child custody and property settlement issues.
In Canada before 1968, the only grounds for divorce were adultery or cruelty. However, in 1968, the Divorce Act was amended to permit divorce for other reasons, including physical and mental cruelty and separation for at least 3 years. The Divorce Act was amended in 1986 to reduce the separation period to one year, with no requirement to prove "fault" by either spouse. The fault grounds for divorce are also available.
China has allowed no-fault divorce since the adoption of the New Marriage Law in 1950. No-fault divorce has become much more common since the 1980s. The current marriage law provides that divorce shall always be granted if sought by both husband and wife. Divorce is also granted if one party can present evidence of incompatibility, such as separation for at least two years.
Divorce may be granted either by court or by a marriage registration office. The latter can only do so when both parties have reached an agreement on child custody and property settlement.
Until 1976, divorce was only possible if one spouse had acted wrongly - a rule referred to as the Schuldprinzip (“principle of guilt”). In 1976, the law was changed to make no-fault divorces the standard. The law says that ”A marriage may be dissolved by divorce if it has broken down. The marriage has broken down if the conjugal community of the spouses no longer exists and it cannot be expected that the spouses restore it.” 
Some provisions of the old, guilt-based system remain. In particular, the separation period required before a formal divorce can be shortened if “the continuation of the marriage would be an unreasonable hardship for the petitioner for reasons that lie in the person of the other spouse”. While formally no guilt is required on the part of the spouse, in practice this rule is usually applied if the spouse acts irresponsibly, for example if they are violent or threaten their partner. 
In Mexico City, this type of divorce is legally known as divorcio incausado o sin expresión de causa and colloquially as divorcio exprés. The law was passed for the first time in Mexico City in 2008 and held constitutional by the Supreme Court, which in 2015 established that any state law requiring to prove the case for a divorce was unconstitutional.[ citation needed]
No-fault divorce was introduced by the Bolsheviks following the Russian Revolution of 1917.  Before the Revolution, religious institutions tended to define family life. It was the ecclesiastical law of the various denominations that controlled the family, marriage, and divorce. For example, the official registration of birth, death, marriage, and divorce was the responsibility of the parish church. Under these non-secular laws, divorce was highly restricted (but always somewhat available, as no major religion in Russia completely disallowed divorce).
The 1918 Decree on Divorce eliminated the religious marriage and the underlying ecclesiastical law, replacing them with civil marriage sanctioned by the state. Divorce was obtained by filing a mutual consent document with the Russian Registry Office, or by the unilateral request of one party to the court. The divorce law under the Bolsheviks did not penalize the husband with alimony, child support, or debtor's prison for non-payment, as every individual was to be provided for by the state anyway. The two partners were entirely free of legal obligations to each other after divorce.
Swedish law does not include a showing-of-fault requirement for divorce. The couple can file for divorce together or one party can file alone. If one party does not wish to get divorced or if they have children under 16 living at home, there is a required contemplation period of 6 to 12 months. During this period, they stay married and the request must be confirmed after the waiting period for the divorce to go through. 
The UK's current fault-based system has been reported in the media as unnecessarily provocative, in that couples have to appropriate blame for the marriage breakdown. The most vulnerable people during divorce are typically children, as numerous studies have shown.   The UK Family Justice System follows the Children Act 1989 Part 1 Section 1 which states 'the child's welfare shall be the court's paramount consideration' when a court determines any question with respect to the upbringing of a child.  Following years of campaigning by the legal community, the UK government has committed to introducing no-fault divorce, though the timing of that introduction is unclear.  
Today, every state plus the District of Columbia permits no-fault divorce, though requirements for obtaining a no-fault divorce vary.  California was the first U.S. state to pass a no-fault divorce law. Its law was signed by Governor Ronald Reagan, a divorced and remarried former movie actor, and came into effect in 1970.  New York was the last state to pass a no-fault divorce law; that law was passed in 2010.  
In the States of Wisconsin, Oregon, Washington, Nevada, Nebraska, Montana, Missouri, Minnesota, Michigan, Kentucky, Kansas, Iowa, Indiana, Hawaii, Florida, Colorado and California, a person seeking a divorce is not permitted to allege a fault-based ground (e.g. adultery, abandonment or cruelty). 
Prior to the advent of no-fault divorce, a divorce was processed through the adversarial system as a civil action, meaning that a divorce could be obtained only through a showing of fault of one (and only one) of the parties in a marriage. This required that one spouse plead that the other had committed adultery, abandonment, felony, or other similarly culpable acts. However, the other spouse could plead a variety of defenses, like recrimination (essentially an accusation of "so did you"). A judge could find that the respondent had not committed the alleged act or the judge could accept the defense of recrimination and find both spouses at fault for the dysfunctional nature of their marriage.  Either of these two findings was sufficient to defeat an action for divorce, which meant that the parties remained married. 
In some states, requirements were even more stringent. For instance, under its original (1819) constitution, Alabama required not only the consent of a court of chancery for a divorce (and only "in cases provided for by law"), but equally that of two-thirds of both houses of the state legislature.  This requirement was dropped in 1861, when the state adopted a new constitution at the outset of the American Civil War. The required vote in this case was even stricter than that required to overturn the governor's veto in Alabama, which required only a simple majority of both houses of the General Assembly. 
These requirements could be problematic if both spouses were at fault or if neither spouse had committed a legally culpable act but both spouses desired a divorce by mutual consent. Lawyers began to advise their clients on how to create legal fictions to bypass the statutory requirements. One method popular in New York was referred to as "collusive adultery", in which both sides deliberately agreed that the wife would come home at a certain time and discover her husband committing adultery with a "mistress" obtained for the occasion.  The wife would then falsely swear to a carefully tailored version of these facts in court (thereby committing perjury). The husband would admit a similar version of those facts. The judge would convict the husband of adultery, and the couple could be divorced.
In many other states, especially California, the most popular allegation for divorce was cruelty (which was then unavailable in New York). For example, in 1950, wives pleaded "cruelty" as the basis for 70 percent of San Francisco divorce cases.  Wives would regularly testify to the same facts: their husbands swore at them, hit them, and generally treated them terribly.  This procedure was described by Supreme Court of California Associate Justice Stanley Mosk:
Every day, in every superior court in the state, the same melancholy charade was played: the "innocent" spouse, generally the wife, would take the stand and, to the accompanying cacophony of sobbing and nose-blowing, testify under the deft guidance of an attorney to the spousal conduct that she deemed "cruel." 
An even simpler practice for people living in states where divorce was difficult to obtain was to go "forum shopping." This meant one of the parties would move to another state where no-fault divorce was available, stay there long enough to become a resident, then file for divorce there. Nevada was extremely popular for this purpose as its residency period was only six weeks.  For some couples, if there really was no problem in settling the issues of their marriage, a weekend trip to Mexico was also an option. Or in some cases, a party deciding they wanted to marry someone else could combine a filing for divorce and a new marriage in one trip to Mexico. As no-fault became near-universal, the need to use Nevada or Mexico to evade restrictive divorce laws became less and less necessary.
Many American lawyers and judges objected to the legal fictions used to satisfy the requirements for divorce, which were effectively rendering oaths meaningless and threatening to wreck the integrity of the American justice system by making perjury into a commonplace occurrence. As early as the 1930s, a treatise on American family law complained:
In divorce litigation it is well known that the parties often seek to evade the statutory limitations and thus there is great danger of perjury, collusion, and fraud . . . . In many cases no defense is interposed, and often when the case is contested the contest is not waged with vigor or good faith. 
In addition, advocates for no-fault divorce argued that the law should be changed to provide a straightforward procedure for ending a marriage, rather than forcing a couple who simply couldn't get along to choose between living together in "marital hell"[ where?]or lying under oath in open court.[ citation needed](Where in 20th-century America was it legally mandated that married couples must continue to live together unless or until they obtained a divorce? Either substantiate this claim by citing source(s), put the claim in the form of an actual direct quote from a specifically named person, or remove the claim from this article.) The most prominent advocate of this position was feminist law professor Herma Hill Kay (who later became dean of UC Berkeley School of Law). 
At its convention in 1947, the National Association of Women Lawyers (NAWL) voted to draft and promote a bill that would embody the ideal of no-fault divorce and describes its efforts to promote the passage of no-fault divorce laws as "the greatest project NAWL has ever undertaken." 
California adopted no-fault divorce with the Family Law Act of 1969, which became effective January 1, 1970.  The Act abolished California's action for divorce and replaced it with a proceeding for dissolution of marriage on the grounds of irreconcilable differences. The grounds of irreconcilable differences are accepted as true, and can be based on the assertions of one of the parties to the marriage.  
At about the same time that California adopted no-fault divorce, the National Conference of Commissioners of Uniform State Laws (NCCUSL) appointed a committee to draft a uniform marriage and divorce law for consideration by state legislatures, and the American Bar Association's Family Law Section was asked to appoint a committee to work with the committee from the NCCUSL.  The initial draft of the Uniform Marriage and Divorce Law written by the NCCUSL committee would direct judges to grant the petitioner's request to end the marriage if the judge found that the marriage was "irretrievably broken", a term which this draft did not define.  Since the term "irretrievably broken" was not defined, the committee from the American Bar Association (ABA) Family Law Section disapproved of this draft of the Uniform Marriage and Divorce Act.  In response, the NCCUSL committee added a 180-day separation requirement in order for judges to find that the marriage had been irretrievably broken.  However, the NCCUSL committee also added language to allow judges to grant a petitioner a divorce if "there is serious marital discord adversely affecting one or both parties toward the marriage."  A further problem with "irretrievably broken" is that it seems to assume that broken pieces are somehow acceptable if they can be retrieved, even though they are not put back together. 
The committee from the ABA Family Law Section objected to the ability of a petitioner to avoid the 180-day separation requirement by asserting "serious marital discord".  In his letter recommending that the American Bar Association House of Delegates not approve the amended draft proposed by the NCCUSL, Arnold J. Gibbs, the chairman of the ABA Family Law Section, stated that the NCCUSL's proposed draft created a rubber stamp type of divorce procedure. He wrote: "The creation of a mere 'rubber stamp type' of divorce procedure would not be in the best interests of the family, its individual members, and society in general." 
Copies of the recommendation to disapprove the NCCUSL's amended draft were provided to the National Conference of Commissioners of Uniform State Laws (NCCUSL), Young Lawyers Section and the National Association of Women Lawyers (NAWL).  The committee from the NCCUSL refused to further amend its draft of the Uniform Marriage and Divorce Act.  
At the 1974 midwinter meeting of the American Bar Association in Houston, Council members of the Family Law Section indicated dissatisfaction with the public image the section was getting from its opposition to the NCCUSL's draft of the Uniform Marriage and Divorce Act. In a policy statement, the ABA Family Law Section chose "to recognize separation only as conclusive evidence of marital breakdown and not as its unbending test", implying that "other kinds of evidence would be admissible to establish breakdown as well." 
By 1977, nine states had adopted no-fault divorce laws,  and by late 1983, every state but South Dakota and New York had adopted some form of no-fault divorce (although some forms were not as easy to obtain as that in California).  South Dakota adopted no-fault divorce in 1985.  Until August 2010, New York still lacked a unilateral no-fault divorce statute; under New York divorce law, only if both parties executed and acknowledged a separation agreement and lived separately for one year could a judge convert it into a divorce. New York governor David Paterson signed a no-fault divorce bill on August 15, 2010. As of October 2010 [update], no-fault divorce is allowed in all fifty states and the District of Columbia.
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