"Revolutionary" or "radical" refers to ideas, actions, or movements that seek significant change in political, social, or economic systems. These changes often challenge established norms and can lead to the overthrow of existing authorities. Revolutionary movements aim to create a new order, often inspired by ideologies such as Marxism or anarchism. Historically, revolutions have played a crucial role in shaping nations and societies. Examples include the American Revolution and the French Revolution, which sought to replace monarchies with democratic governance. Such movements can lead to both positive reforms and significant upheaval, impacting millions of lives.