Re: decide
A classmate had a french mother, a german father and was born and raised in Belgium. This was a case when the town authorities asked him to choose.
Because I'm born from a Belgian father ,in Belgium, I was Belgian right from the start and that's how I'm considered here.
However, because my mother is from the US, as a first generation descendant from a US citizen, I also have the right to be a US citizen. I even have a US passport which apparently not all US citizens have.
I fill up an IRS form every year.
There are millions of people with various citizenships.
Raoul