Liberalism is a predominant ideology that emphasizes individual liberties and rights. It originated in the Enlightenment and was influenced by philosophers like John Locke. Liberalism seeks to limit government power and establish democratic and capitalist systems with protections for civil liberties. It has taken various forms like classical liberalism, social liberalism, and neoliberalism. The spread of liberalism in the 19th century impacted the Muslim world through reforms in the Ottoman Empire like the Tanzimat, which aimed to modernize the state but also contributed to a crisis of identity in Islam and rise of Islamic revivalism.