Many people believe that being an extrovert versus an introvert is due to their environment, but it is most likely due to genetic traits. An example of this is due to the genetic correlation of genes to stimulation alertness. Introverts have more of this “alertness” chemical than extroverts do, meaning that they tend to dislike being in busy places and around many people. Extroverts, on the other hand, don’t have as much of this chemical and tend to enjoy being around other people; they could seek out environments that cause a sense of pressure without the risk of discomfort. The excess chemical within introverts causes a sense of pressure within them making them dislike being in more pressure inducing situations such as speaking to a group or being in a crowd. 

Being an introvert means a lot of things. Most introverts dislike being around others and they have trouble speaking in social situations. While extroverts enjoy speaking to others and constantly want to be in social situations. But it’s important to note that this arousal chemical and just being an introvert doesn’t necessarily mean one is unhappy. There are many unhappy extroverts and very happy introverts. Though introverts and extroverts are the way they are because of their personal preferences and where they grew up, a lot of their state can be attributed to their genetic traits and how much of a certain chemical they have within them.