Comment He's wrong (Score 1) 646
Yes it is a hostile environment but three things drive expansion -
1. economics
2. technology
3. discontent
The technology and economics still don't work. Those are the current limiting factors. When we get a an economic model that matches available technology to potential resources we WILL start sending large numbers of people into space. There are too many potential resources not to.
At that point it comes down to WHO will be willing to go out to the new frontier - based on history it's going to be those who are unhappy with the societal limitations here on Earth. They are probably NOT going to go out with the intent of starting a family but that will come unless there is some reason pregnancy is not viable in space.
The next big question - does it make more sense to gown down a gravity well like Mars or mine asteroids and build in space?
Once people CAN get into space cheaply they WILL go into space if they can find the freedom economic/political/societal that they can't find on earth.