International law says people fighting for self-determination can use force in order to achieve their independence.

There are both things in international law: the principle of territorial integrity and right to self-determination.

Governments are mandated by international law to protect people from genocide.

Individual and national rights to wealth rest on the basis of civil and international law, or at least of custom that has the force of law.

Pre-emptive war might fall within the framework of international law.

I do think that Magna Carta and international law are worth paying some attention to.