Second neighborhood problem

The Second Neighborhood Problem is when people choose to surround themselves with the same kinds of people rather than those who are different. For example, if you are a friendly person, maybe you like to hang out with other friendly people; or if you love music, maybe you like to have friends who also love music. Sometimes, it is good to be with people that are like you, but being around a group of people who are all the same can make it hard to understand different perspectives and learn new things.