Our citizens have many different backgrounds and this can make grouping them into racial categories even more difficult. In a perfect world if we were to group eachother into racial groups everyone in that certain group would look the same. However, this is not a perfect world and there tends to be a lot of overlap between groups. The sociological concept between-group variation says that there should be a very distinct difference between racial groups separating them. This is not the case. There are people who are considered white who have skin color that is darker than people who are considered black. Within-group variation says that people who are within the same group should be very similar to each other. This also is not the case. For example, a person who has very dark skin can be placed in the same racial group as someone who has skin that is much lighter than