This classic defense of orthodox Christianity, written to counter the liberalism that arose in the early 1900s, establishes the importance of scriptural doctrine and contrasts the teachings of liberalism and orthodoxy on God and man, the Bible, Christ, salvation, and the church. J.áGresham Machen’s Christianity and Liberalism has remained relevant through the years ever since its original publication in 1923. It was named one of the top 100 books of the millennium by World magazine and one of the top 100 books of the twentieth century by Christianity Today.