Biological stress that exceeds a certain threshold drives adaptive responses. However, the ability to adapt is not unlimited and depends on the stress not exceeding safe limits. Similarly, an appropriate amount of psychological stress will motivate us to act to the best of our ability. However, an excessive amount of stress that chronically persists despite taking action or because of failing to act, has substantial psychological and biological detrimental effects. Consequently, we need to built personal and societal defense mechanisms to protect us from chronic stress.