At first, the collectivists worked with the Marxists to push the First International in a more revolutionary socialist direction. Subsequently, the International became polarised into two camps, with Marx and Bakunin as their respective figureheads. Bakunin characterised Marx's ideas as centralist and predicted that, if a Marxist party came to power, its leaders would simply take the place of the ruling class they had fought against. In 1872, the conflict climaxed with a final split between the two groups at the Hague Congress, where Bakunin and James Guillaume were expelled from the International and its headquarters were transferred to New York. In response, the federalist sections formed their own International at the 1872 St. Imier Congress, adopting a revolutionary anarchist program.