The amount of mental health issues and loneliness in America is concerning. There are many factors that contribute to this, but one big one that I rarely hear discussed is city design. We live in isolated bubbles, much too far away from others to walk or bike to them. This decreases the amount of human interaction we get, and it degrades the quality of our human interaction. If we want mental health and loneliness to improve, we have to redesign the places we live in.