Social Darwinism explained the operation of society as "survival of the fittest."
People often associate the term "survival of the fittest" with Charles Darwin, but actually it was terminology that came from Herbert Spencer, the founder of what is known as Social Darwinism. (Spencer wouldn't have called it that - he and Darwin were rivals.) Darwin used the term "natural selection" in his descriptions of biological evolution. Spencer was unafraid to apply the same concepts to competition within the human species, contending that the stronger, fitter social or cultural groups will survive better than others and dominate over weaker groups.
Some of the responsibilities of vassals for the lord included: Maintain the Lord's manor...Watch over day-to-day activities...And occasionally help advise the king on simple matters of the land.
The corporation is the answer
Because the supplies were being given from the Russians which had a underground network (both literally and figuratively) that transported weapons through out the country were the US could not attack.
Also, the Ho Chi Min trail was located in Cambodia which the US did not AT FIRST want to attack, and so it gave almost a clear safe path for both the Russians and NVA to get guns into South Vietnamese. Then from there, they would be given to the Viet Cong (who were underground). And then the Viet Cong would either use them, or give them to South Vietnamese people who were North Vietnamese or Communist sympathizers.
