Public International Law is a system of law
To use war as a legal object to resolve conflict, there has to be either self-defence or the
agreement of the security council of UN (if there's a threat to peace etc).
State (def)
"Inter-American convention on the rights and Duties of States!" (Montevideo 26.12.1933)
A permanent population biggest part are citizens of the state, + citizens of other states,
who have a residence permit, stateless person (apatrid), people with multiple citizenships
(bipatrid).
How to get citizenship
by birth:
lex sanguinis blood principle, by birth, given to the child according to the
citizenship of the parents (if parents are citizens of different countries different
legislation can provide different solutions, they could choose or the child could
choose);
lex soli ground principle, given due to the place of birth, typical for Anglo-
annaabi.ee 
