Proxima Centauri isn't really "nearby" in any sense the average person would think of. At 4.24 light-years away, it turns space travel from an adventure into an inheritance, where the people who launch the mission will never live to see the destination.
A generation ship is not just a spacecraft. It is a sealed city, farm, factory, school, government, ecosystem, archive, and family tree, all packed inside a machine that must keep working long after everyone who built it is gone.
The real challenge is not simply crossing the void. It is keeping water clean, air breathable, food growing, engines running, children educated, populations stable, laws respected, and hope alive among people born into a mission they never chose.
The journey to another star forces one brutal question after another: who gets to leave, who gets to decide, and what kind of civilization can survive for centuries with no rescue, no resupply, and no turning back? Humanity's first interstellar voyage may not look like a sleek leap into the future, but like a fragile world carrying everything it knows into the dark.