Comment by robgibbons

It might sound cynical but it's accurate. There was a big political will to go to the moon because the USSR was beating us at every important space milestone. That galvanized the American government sufficiently to spend massive amounts of capital to win the space race.

After a decade or two, and the loss of any real competition, the US lost the political will to keep pushing boundaries. The primary reason we don't still have the immediate capability to put people onto the moon isn't technical, it's political. We are only now reigniting that desire, and again, it's because of another great power starting to push things in space.

It was CCCP pushing us then, it's the CCP now.