People are herding animals. They live in groups. Living in groups leads to interactions between members(black structures). The interactions create conflicts(yellow-tinted spots). The conflicts generate wars(grey structures) or rules(blue lines).
Life is black.Life is dark. Life is confusing. That's true when you are absolutely alone. People define your life. People give your life proportions, directions and colors(the rectangles). Some of people are nice, some are more bleak. But interactions with this huge, diverse crowd are the essence of everyone's life.