•Why it earns a slot
The clearest popular rebuttal to the conservative case against revolutionary change, written to reach ordinary readers rather than fellow statesmen, and popular enough to get its author charged with treason.
Paine wrote Rights of Man as a point-by-point response to Edmund Burke, who had attacked the French Revolution and defended England's inherited constitutional settlement. Paine's central argument is that no generation, government, or parliament has the right to bind all future generations forever, since rights belong to the living, not to agreements made by people who are dead.
This distillation is written from the freely available original, which is always the better read when you have the time: Project Gutenberg.