Did you do something to earn your nationality? No, but we all contribute to our nation (taxes, labor, voting) so when our nation achieves something great, we s

Did you do something to earn your nationality? No, but we all contribute to our nation (taxes, labor, voting) so when our nation achieves something great, we share a small part of that success. Think of a soccer team. Everybody on the team celebrates and feels proud when #23 scores a goal, even though they didn't score the goal themselves. They share in #23's success.