Fatos Thanas Nano is an Albanian socialist politician who served as Prime Minister of Albania in 1991, from 1997 to 1998 and from 2002 to 2005. He was the first leader and founder of the Socialist Party of Albania and a member of the Albanian Parliament from 1991 to 1993 and 1997 to 2009. He reformed the anti-revisionist Marxist-Leninist ideology of the Labor Party of Albania into social democracy for its successor, the Socialist Party. During his leadership, the Socialist Party, as a result of reforms, joined the Socialist International and Party of European Socialists. Nano was a candidate in the 2007 presidential election but did not win. He again tried in the 2012 presidential election, but he did not even qualify as a candidate, because the leaders of parties in Parliament obstructed their respective MPs to elect him as candidate in the elections.

The Socialist Party of Albania is a social-democratic political party in Albania. It has been described as centre-left. It was founded on 13 June 1991. The PS is an associate of the Party of European Socialists and a member of the Socialist International, and holds pro-European views.