We won't tell you anything new by saying that we all are human, but each person is unique. Everyone has different aspirations, skills, weaknesses, body types, sexualities, beliefs... Everybody comes from different backgrounds, cultures, speaks various languages, etc. However, a lot of societies today reject the diverse nature of our kind. Not only reject it, but establish a standard of "normality" and neglect those who deviate from the line that the society has drawn.