Land grabs shall not be tolerated.
There are a few other things in international politics that while accepted in the past should not be allowed in the present given or current understanding of nation-states and self determination of the peoples.
Land grabs are one of these. Genocide is one other.
I'm a little ambiguous about making a principle regarding the forceful removal of leaders by international coalitions or foreign powers, as well as the support of separatist movements.