The Georgia guide stones
Even though they were put in place by a nut job most of what they say is good advice.
But keeping the worlds population down to 500,000?
Considering they were built in 1980 when the worlds population was 4.4 billion how do the expect to achieve that
There was a group of people that tried to control the worlds population in the 1940's
It didn't work out so well for all parties involved