>>1
Eugenics is the only way tokiko.
Women with IQ less than 95 and men with an IQ less than 115 are sterilized / severely economically disincentivized from procreating.
2 generations is all it would take

>>1
1. Die
2. Leave this shithole for someone else to fix
People have been doing this since the beginning of humanity

>>1
Everyone just agrees to stop fighting.

The end.

>>1

make world peace

will never work. game theory shows that in a cooperative/antagonistic choice scenario it is beneficial to antagonize/cheat X% of the time of multiple iterations (% determined by risk/reward, but never zero). Evolutionarily speaking, people who occasionaly get in other people's faces will pass on stronger genes.