Explore this authoritative 10-essay by Tanmoy Bhattacharyya, covering the world’s major living religions at PhD-level depth. Inquiring into Hindu-religion (including Sikhism & ISKCON), Buddhism’s global transformations, Judaism in America and Israel, Christianity’s historical triumph over Greco-Roman polytheism, Islam with focus on Ayatollah Khomeini’s revolutionary movement, Roman Catholicism under Vatican authority, Jainism’s ascetic ethics, East Asian traditions (Shinto, Confucianism, Taoism), American Pentecostalism’s charismatic rise, imperialistic trends, political dominance, conversion dynamics, and demographic/political regime shifts, plus an overview of new religious movements. Updated for 2026, these essays examine doctrinal foundations, historical evolution, modern adaptations, socio-political engagements, and contemporary challenges, offering scholars, students, and interfaith researchers a rigorous, balanced synthesis of theology, culture, and global influence. Perfect for religious studies, comparative religion, and interfaith dialogue.