Profoundly affected by postwar existential philosophy, Crozier consciously allied himself and his work with contemporary European art throughout the 1950s and 1960s, towards painters such as Jean Dubuffet, Pierre Soulages, Hans Hartung, and Nicolas de Staël. The landscape became the source of visceral paintings: for Crozier, ravaged landscapes symbolized the torment and fear of the postwar condition at the heart of existentialism. Only ten years separate these images of traumatized humanity from the luxuriantly colorful works inspired by the landscape of West Cork. His early skill as a colorist reaches its zenith in paintings that capture the essence and appearance of the West Cork landscape in ways immediately recognizable to the viewer, but they are also concerned to capture a landscape during a period of great physical and social change. Crozier believed that when painting the Irish landscape he must "Tell the truth. Say it simply."