Socialist International

The Socialist International (SI) is a political international consisting mostly of social democratic political parties and labour organisations. The SI was founded in support of democratic socialism, albeit it has generally moderated over time.

Although formed in 1951 as a successor to the Labour and Socialist International, it has antecedents in the late 19th century. The organisation currently includes 132 member parties and organisations from over 100 countries. Its members have governed in many countries, including most of Europe. In 2013, a schism in the SI led to the establishment of the Progressive Alliance.

The current president is the prime minister of Spain, Pedro Sánchez, elected at the last SI Congress held in Madrid, Spain, in November 2022.