The Horizon of Modernity provides an extensive account of New Confucian philosophy that cuts through the boundaries between history and thought. This study explores Mou Zongsan's and Tang Junyi's critical confrontation with Marxism and Communism in relation to their engagement with Western thinkers such as Kant and Hegel. The author analyzes central conceptual aporias in the works of Mou, Tang, as well as Xiong Shili in the context of the revival of Confucianism in contemporary China and the emergence of the discipline of philosophy in twentieth-century Chinese intellectual history. This book casts new light on the nexus between the categories of subjectivity and social structure and the relation between philosophy, modern temporality, and the structural conditions of the modern world.