Athletes in both contact and non-contact sports are at an increased risk for traumatic brain injuries (TBI). Sports-related concussions usually fall into a subset of TBI known as mild TBI.
Eugenics is the practice or advocacy of improving the human species by selectively mating people with specific desirable hereditary traits. It aims to reduce human suffering by "breeding out" disease, disabilities and so-called undesirable characteristics from the human population.
Depression is a mood disorder. It is beyond normal sadness that all humans experience. It is persistent and chronic low moods with a significant loss of interest in things you previously found enjoyable.
Identity is a huge part of who we are and how we live our lives. If people did not have identities, then we would all essentially be the same.
Being able to control our emotions in certain situations allows people to bond and make connections with those they are with at that moment. Someone who is unable to properly regulate their emotions may find themselves ostracized and alienated by a social group.