Revolution: A revolution is a sudden and drastic change in political, social, or economic structures within a society. (e.g., French Revolution)
Reformation: The Reformation refers to the religious movement in Europe during the 16th century that led to the establishment of Protestantism and challenged the authority of the Catholic Church.
Enlightenment: The Enlightenment was an intellectual and philosophical movement during the 18th century that emphasized reason, science, and individual rights as opposed to traditional authority.