/sci/ - Science & Math

Why would people want to leave earth to colonize mars/moons/asteroids? Assuming we're able to get them to a livable state and prevent Jellobabies, what makes these new habitats desirable? Earth isn't going to get too populated, once global fertility drops below 2 there should be a surplus of space. Life offworld seems difficult, claustrophobic, and unnecessarily dangerous. At first there would definitely be novelty to drive people but once that wears off I feel like no one would want to leave earth, it is the environment we are best adapted to after all. Is there a way around this? Also, how do we get colonists to breed?