Humans are stupid.
You have Brexit and here in the states we have Trump or President Ignoranus
President Ignoramus Grandus. (PIG)
...and Australia has a Prime Minister who took a Hawaiian vacation while Australia burned, denies climate change and hands out money and favors to the rich. Oh, and did I mentioned that he is also a religious fanatic? Trying to push through religious anti discrimination laws. Sigh. The rot is everywhere. What happened to us? Did we tire of democracy or something? What did I miss?
The really stupid ones retire themselves from the gene pool, which is an advantage for mankind!