The current liminting factors on the human population do not include

I dont know what the options are, but global warming scarcity overpopulation non-renewable resources, and pollution. I dont know if that helped or not 

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey