Since Galileo saw mountains on the moon in the 17th century, humans have been bitten to go there.
When Apollo missions came true in 1969, the US space program began to imagine a future made on the moon. In 1984, a NASA symposium on the issue was convened after its organizers "realized that space transportation technology in the year 2000 would be able to carry routine loads to the moon" and They thought they had to start planning ahead of time.
Unfortunately, no country on Earth had spatial transport technology capable of routine visits to the moon before the year 2000. In addition, we had little idea of the true nature of the lunar surface.