Complex sentence: By the Fall of 1966, Gold had rejected many Old Left cultural and lifestyle values which he had come to regard as too "bourgeois", but he considered himself a Marxist and a communist who sought to establish "decentralized socialism" in the United States.
Split into simpler sentences: By the Fall of 1966, Gold had rejected many Old Left cultural and lifestyle values which he had come to regard as too "bourgeois". But he considered himself a Marxist and a communist who sought to establish "decentralized socialism" in the United States.