 Complete the following phrase:  In the wake of Being and Nothingness, Sartre became concerned to reconcile his concept of freedom with concrete social subjects and was strongly influenced in this regard by his friend and associate Maurice Merleau-Ponty, whose writings in the late 1940s and early 1950s such as Sense and Non-Sense were pioneering a path towards a synthesis of existentialism and Marxism. Merleau-Ponty, however, then became increasingly skeptical of Marxism, culminating in his Adventures of the Dialectic 1955, while Sartre continued to grow more engaged with Marxist thought. Though Sartre had, by 1957, decisively broken with the Soviet Union and official Marxism in the wake of the Soviet suppression of the 