International Movement for Socialism

The International Movement for Socialism (IMS) is an international congress of communist and socialist parties. Member parties of the IMS espouse ideologies ranging from to.

The objective of the IMS is to further cooperation between leftist parties in Anterra and to defend the continued existence of leftist parties. Due to the nature of the IMS being comprised of parties, not states, the IMS does not function as a military alliance. However, since several member parties are also the ruling parties in their respective states, the IMS could be considered a de facto military alliance under certain conditions.

While the IMS allows membership to a wide array of leftist ideologies, it forbids membership by political parties.

List of observer and applicant parties
Note: the four Socialist parties in SiWallqanqa only achieved legitimacy within their own country in 2018, but have been extant for a longer time