[7] Atassut was established in late 1976 as a political movement of conservative and unionist forces in Greenland to oppose Siumut with Lars Chemnitz as its leading figure;[7] however, it soon became more liberal.

Previously one of the two largest and most influential political parties in Greenland, the Atassut has seen its share of the popular vote consistently decline since the mid-1990s.

[8] From the 2014 parliamentary election to 2016, Atassut was a part of a coalition government, led by Kim Kielsen from Siumut, that also including the Inuit Ataqatigiit.

[11] Following the election, Atassut offered external support to the governing coalition formed by the Inuit Ataqatigiit and Naleraq parties.

[1][12] The party supports privatisation of public industries, a form of citizen's income, NATO co-operation, and Greenlandic affiliation with the European Union.