The Democratic Left Alliance (Sojusz Lewicy Demokratycznej, SLD) is a political party in Poland that was founded in 1999. It emerged from a coalition of leftist groups and has its roots in the former ruling party of Poland during the communist era. The SLD advocates for social democracy, promoting policies that support social justice, workers' rights, and public welfare. The party has participated in various elections and has been part of the Polish parliament, known as the Sejm. Over the years, the SLD has faced challenges, including declining popularity and internal divisions, but it continues to play a role in the country's political landscape.