Hello there!
So, Harrison White is a very smart man who studied how people are social with each other.
You know how you have friends and family and you like to play with them and do things together, right? Well, Harrison White wanted to understand why people choose to become friends with some people and not others.
He found out that people tend to like other people who are similar to them. For example, if you really like to play soccer, you might become friends with other kids who like soccer too.
Harrison White also studied how people belong to different groups, like your family, your school, your church, and your neighborhood. He found out that people behave differently depending on which group they belong to.
That's a little bit about Harrison White!