Criticism of Christianity has a long history which stretches back to the initial formation of the religion in the Roman Empire. Critics have challenged Christian beliefs and teachings as well as Christian actions, from the Crusades to modern terrorism. The arguments against Christianity include the suppositions that it is a faith of violence, corruption, superstition, polytheism, homophobia, bigotry, pontification, abuses of women's rights and sectarianism.
In the early years of Christianity, the Neoplatonic philosopher Porphyry emerged as one of the major critics with his book Against the Christians, along with other writers like Celsus and Julian. Porphyry argued that Christianity was based on false prophecies that had not yet materialized. Following the adoption of Christianity under the Roman Empire, dissenting religious voices were gradually suppressed by both governments and ecclesiastical authorities —however Christianity did face theological criticisms from other Abrahamic religions like Judaism and Islam in the meantime, such as Maimonides who argued that it was idolatry. A millennium later, the Protestant Reformation led to a fundamental split in European Christianity and rekindled critical voices about the Christian faith, both internally and externally. In the 17th century, Deist philosophers such as Thomas Hobbes and Jean-Jacques Rousseau were critical of Christianity as a revealed religion. With the Age of Enlightenment, Christianity was criticized by major thinkers and philosophers, such as Voltaire, David Hume, Thomas Paine, and the Baron d'Holbach. The central theme of these critiques sought to negate the historical accuracy of the Christian Bible and focused on the perceived corruption of Christian religious authorities. Other thinkers, like Immanuel Kant, launched systematic and comprehensive critiques of Christian theology by attempting to refute arguments for theism.
In modern times, Christianity has faced substantial criticism from a wide array of political movements and ideologies.