A small community seems to be the best answer
Explanation:
You could be nice to the other person when they win and you don't.
If you win then you shouldn't brag.
Play fair
Its started after World War 2 because after a lot of issues arose between the US and USSR. They had a mutual distrust with each other stemming from the way the US had perceived the USSR as an illegitimate part of the international community. The way the USSR perceived the US as people who intervened in everyone's business and had amounted weapons.
The increase in price as the quality increase
