In 1970, however, Fortuna decided to finally present his proposal of law, together with liberal colleague Antonio Baslini, gaining support from the PCI, the Radical Party and the left wing, but opposed by the Christian Democracy. The law, which legalized and regulated divorce in Italy, was then approved on December 1, 1970.
In 1974, Christian Democracy tried to repeal it via a national referendum, but failed, with 59.3% of Italians favourable to maintain the law on divorce. During the referendum campaign, Fortuna bound up with Radical leader Marco Pannella, and then joined his party, but continuing to be member of the Socialist Party.
Subsequently, Fortuna was a strong supporter and promoter also for the law on abortion, which was depenalized in 1978 and survived to another referendum in 1981. He died in Rome, soon after having asked Bettino Craxi for an electoral alliance between the PSI and the Radicals.
In 2005, the name of Loris Fortuna came back to national political scene, following the formation of the Rose in the Fist, an electoral alliance including Radicals and Socialists, and openly based on the principles of José Luis Zapatero, Tony Blair and Fortuna himself.