When we search for a lifelong partner, we often find we’re looking for things that are wildly different depending on who you ask. You might be looking for a partner who knows how you make you laugh, while the person sitting next to you might be looking for someone who can keep them grounded, or anything else. However, it turns out that at our core, we might be looking for someone who’s an awful lot like us. New research has come out that shows that who we end up with might not depend on our personalities, but on our genetics. We’re not looking for someone literally swimming in our gene pool, but we might be subconsciously looking for people whose genes are similar to our own. This genetic effect might not even determine how we date and who we end up with, but how the current social system as we know it evolved into what it is today. Here’s what you need to know about how who we love can be determined by our genetics, and how that can end up affecting the world we live in.