Since the beginning of the democratization process, MR-8 was active inside the Brazilian Democratic Movement Party (PMDB), being an arm of quercismo in the social movements.[2] In 2008, after considering a merger with the Workers' Party (PT), members of MR-8 decided to create a new political party.[2] The founding act of PPL happened on April 21, 2009 and was attended by hundreds of members of PMDB, as well as several representatives of left-leaning parties, such as PT, PCdoB, PSB, PDT, PCB and the Communist Party of Bolivia.[2] On October 3, 2011, judges of the Supreme Electoral Court unanimously granted the request for PPL's creation, making it the 29th legal political party in Brazil.[2]
In the 2014 general election, PPL endorsed Marina Silva, who arrived 3rd with 21,32% of the votes. In the 2018 general election, PPL endorsed João Vicente Goulart (son of former president João Goulart), who got 0,03% of votes, arriving 13th.
In 2018, after falling to get enough votes to keep receiving funds from the Superior Electoral Court, the party announced that it would merge with the Communist Party of Brazil (PCdoB) and in December of that year the party signed a compromise making the merge official and the organization ceased to exist.[6]
Ideology
The political aim of the PPL was to radicalise the course followed by the Luiz Inácio Lula da Silva administration.[2] To this end, it listed five basic objectives: the strengthening of the internal market, in order to generate more jobs; the reduction of the basic interest rate; the technological development of the country; the accomplishment of full economy; and the ensuring of good public health and education for all.[2]