Can you please explain this to me the best that you can? GP would create tolerance because everyone would be in each other's space due to overpopulation. What is a good follow up sentence to put after that.

What does GP mean?

global peace sorry

Your sentence doesn't make any sense to me.

What does global peace have to do with overpopulation? Although people are killed in wars, many people have more children to compensate for the loss of lives.

Why do you think overpopulation breeds tolerance?

Do you understand these terms?

A good follow-up sentence could be: "This increased proximity and overexposure to others would result in people becoming desensitized to the presence of others, leading to a state of tolerance as a way to cope with the overcrowded environment."