Before you can travel internationally, you need your passport. I have two passports.
An American passport and Serbian passport. It’s funny to even consider my Serbian passport as even necessary, what does a Serbian passport give you that an American passport doesn’t? How can a passport issued by an impoverished Balkan country with a population smaller than just the city limits of NYC be useful next to an American passport?
Well, greatly.
Reduced and sometimes no Visa costs. Brazil, Russia, China which require American citizens to jump through hoops and pay expensive Visa fees (around $200) are completely waived for Serbian passport holders. No cumbersome process, no visa fee.
For some countries like Iran, you cannot even travel solo (you need to be part of a group) on a American passport.
It’s amazing what this small passport unlocks. Obviously, there are countries where the American passport becomes useful. Australia, New Zealand, most of Western Europe.
Between these two passports, I will have easy access to much of the world.
Perhaps one day in a purely globalized world, the idea of a passport and all these hoops (and sometimes restrictions) won’t be needed. But as of now, the more passports you can get your hands on, the better.