Problems like infant mortality, disease, manual labour, the human species evolved to deal with those. That’s why exercise releases endorphins. Your body is rewarding you for doing what you need to survive. It has strategies to soften those blows and keep you going. Because you have to.

There are no biological coping mechanisms for cars, city noise, pollution, and financial anxiety. These problems didn’t exist in the ancestral environment. Evolution hasn’t had time to protect us from them. They might not hit as hard in the moment, but we can’t heal from the losses they cause us. That’s why chronic stress, suicide, depression and anxiety are so common nowadays. This is worse. Maybe not in objective germs, but it’s worse for a human being. It hits us in our weak points.