Growing out of the values of the Catholic Church and rural communities, the basic unit of French society was traditionally held to be the family.[17] Over the twentieth century, the "traditional" family structure in France has evolved from various regional models (including extended families and nuclear families[18]) to, after World War II, nuclear families. Since the 1960s, marriages have decreased and divorces have increased in France, and divorce law and legal family status have evolved to reflect these social changes.[19]
According to INSEE figures, household and family composition in metropolitan France continues to evolve. Most significantly, from 1982 to 1999, single parent families have increased from 3.6% to 7.4%; there have also been increases in the number of unmarried couples, childless couples, and single men (from 8.5% to 12.5) and women (from 16.0% to 18.5%). Their analysis indicates that "one in three dwellings are occupied by a person living alone; one in four dwellings are occupied by a childless couple.." [20]
Voted by the French Parliament in November 1999 following some controversy, the pacte civil de solidarité ("civil pact of solidarity") commonly known as a PACS, is a form of civil union between two adults (same-sex or opposite-sex) for organizing their joint life. It brings rights and responsibilities, but less so than marriage. From a legal standpoint, a PACS is a "contract" drawn up between the two individuals, which is stamped and registered by the clerk of the court. Individuals who have registered a PACS are still considered "single" with regard to family status for some purposes, while they are increasingly considered in the same way as married couples are for other purposes. While it was pushed by the government of Prime Minister Lionel Jospin in 1998, it was also opposed, mostly by people on the right-wing who support traditionalist family values and who argued that PACS and the recognition of homosexual unions would be disastrous for French society.
As of 2013, same-sex marriage is legally recognized in France. Same-sex marriage was an important factor in the presidential election of 2012 between François Hollande and Nicolas Sarkozy. Sarkozy, who represents the right-wing UMP party, opposed gay marriage, while François Hollande, of the left wing socialist party, supported it. Hollande was elected in May 2012 and his government proposed the law known as "Mariage pour tous" ("marriage for all") to the parliament in November 2012. The law was passed in April 2013 and validated by the Conseil constitutionnel (the constitutional council, tasked with insuring that the new laws passed do not contradict the French constitution) in May 2013. The first French same-sex marriage took place on May 29, 2013 in Montpellier.