Summary: To explore this topic, we start with the idea that for 99% of history, humans were hunters-gatherers and evolved to live a very different lifestyle — spending time outdoors and tightly connected to their communities. Now that we live indoors, sitting in front of a computer, not socializing or exercising sufficiently, eating processed food, our modern lifestyle is not in line with our nature, and that is the major factor of the present epidemic of depression.
