In the
1882 general election, Costa became the first socialist to be successfully elected to the
Italian Chamber of Deputies, as the representative for
Ravenna. Although he had always proposed that socialists should run as
protest candidates, and that they should not take their seats in parliament, under the advice of Cafiero, he took the
oath of office and took his seat. Costa's entry into parliament was vocally criticised by Italian anarchists. On 18 February 1883, organised an anti-Costa rally in
Milan, but after Costa appeared at the rally and bested Monticelli in a debate, sympathy for Costa among Lombard socialists began to rise. Monticelli subsequently reversed course and began defending Costa from personal attacks and accusations of bad faith. Tuscan anarchists also began to call for a rapprochement with Costa, and the unification of the Italian socialist movement. Meanwhile, Malatesta called for the opposite, demanding a complete break between the anarchists and the legalitarian socialists, and denouncing Costa as a "traitor" to socialism. In August 1883, Costa joined
Felice Cavallotti's
far-left parliamentary alliance, which placed itself in opposition to the government of
Agostino Depretis. This provoked an escalation in attacks from the anarchists, with Malatesta challenging Costa to a public debate. On 20 January 1884, 150 socialists arrived in Ravenna to watch the confrontation, but it never took place, as Costa arrived late and requested it be rescheduled. The following day, at a much smaller meeting, Malatesta demanded Costa resign from the alliance, resign from the parliament and give his seat to the radical anarchist Amilcare Cipriani. Costa said he would do so if the PSRR requested it and left the meeting. This catalysed anarchists in Rimini to demand Costa's resignation from parliament; in July 1884, they took control of the city's socialist federation, forced it to secede from the PSRR and unified the anti-Costa opposition into the "International Romagnol Federation". Meanwhile, at a congress in
Forlì on 20 July 1884, the PSRR was transformed into the
Italian Revolutionary Socialist Party (; PSRI). It now claimed to constitute a national political party, despite its influence still largely being confined to Romagna. As the PSRI grew, Italian anarchists sought to counter its rising influence by reestablishing the Italian Branch of the IWA. At its founding congress in Forlì on 15 March 1885, the Italian IWA denounced the PSRI as a "
bourgeois" political party. On 25 April 1886, the PSRI held a conference in
Mantua, where it hoped to win over landless
farmworkers of the
Po Valley to its programme. However, the workers rejected the PSRI platform of political action and instead sought to develop their own
agricultural cooperatives. The PSRI's focus on agricultural workers made it difficult to work with the
Italian Workers' Party (POI), which focused on urban factory workers. After the POI rejected a proposal to merge with the PSRI, the anarchists sought an anti-parliamentary alliance with the POI. ==Decline==