The significant European event that began in 1789 and led to the rise of radical movements is the French Revolution. This uprising aimed to overthrow the monarchy and establish a republic based on principles of liberty, equality, and fraternity. It sparked widespread political and social change across Europe, challenging existing monarchies and traditional hierarchies. The revolution created a climate that fostered radical ideas, leading to upheaval and the establishment of various democratic movements. Key events like the Storming of the Bastille and Reign of Terror highlighted the intense struggle for political representation and civil rights.