Our future and the earth itself are in danger from pollution, global warming, climate change and a looming energy crisis. The energy crisis will lead to a political crisis and continual and worsening energy wars. In addition we are discovering very real mega dangers from asteroid strikes and supervolcanos. Space technology in general and colonizing the moon in particular, as a first step into space, have the potential to mitigate and/or eliminate these dangers and guarantee a human future.
There are two and a half ways to save the Earth and two of them are on the Moon.