Claim: Search for a Method was written by Jean-Paul Sartre in France about Marxism which is associated with communist parties.
Evidence: Search for a Method or The Problem of Method (French: Questions de méthode) is a 1957 essay by the philosopher Jean-Paul Sartre, in which the author attempts to reconcile Marxism with existentialism. France For the political ideology commonly associated with states governed by communist parties, see Marxism–Leninism. 
France Jean-Paul Sartre Marxism For the political ideology commonly associated with states governed by communist parties, see Marxism–Leninism.