There are more than 500,000 homeless people in America (Johnson). There are many reasons and causes for people to end up living this way, but the biggest cause is tragic life events, for like loss of loved ones, job loss, domestic violence, divorce, and family disputes. Other reasons for homelessness are depression, untreated mental illness, PTSD (post traumatic stress disorder), and physical disabilities ("Top Causes of Homelessness in America."). Many people see homelessness as a bad thing and an issue, but it does serve a purpose in society. Homelessness can be seen in many different ways. In the functionalist perspective homelessness serves a purpose in society. The definition of the functionalist perspective is “a sociological approach