Analytical Marxism's non-Marxist critics also raised methodological objections. Against Elster and the rational choice Marxists, Carver argued that methodological individualism was not the only form of valid explanation in the social sciences, that functionalism in the absence of micro-foundations could remain a convincing and fruitful mode of inquiry, and that rational choice and game theory were far from being universally accepted as sound or useful ways of modelling social institutions and processes.