This made funding easier with all those idiots whining about wanting their social security draining the money well. The plan had a different reaction and those who had just fought for the only cause they could find anymore rained down upon all forms of government. Once those who could supply the drug were gone, the partially crazy mobs became so lost within parts of their minds they didn't even know existed, that they lost all of this so called consciousness they all boasted of before. They began to wander and dwindle and make room for other species to populate until they were a rare treat for some wild animal who happened upon them. Much to the disgrace of those who had come long ago, before they disappeared completely they were reduced once again to animals.
Humans make very feeble animals.
They aren't fast, they aren't agile, and they can't even kill much of anything without the help of tools. Homo erectus didn't last long when they regressed and the rest of the animals progressed.