Comment by imtringued

We have no idea what's under the surface of the moon. We literally know nothing. It could be that the moon is secretly a gold mine of rocket propellant 5 meters under the surface, but we simply never looked deep enough.

We built the first railways on earth 200 years ago. We could build railways on the moon this century. Think about this. The time between the beginning of industrialization and a space civilization could be just 300 years.

Your grand kids would experience the space age, but only if you start working on it today.