Sharp decrease in numbers of native Indians.
One of the main reasons why Spanish conquistadors had to look for slaves from Africa, was the radical decrease in the populations of native Indians. The Indians had either died out of diseases or during the war of conquest. In addition, inter marriages had also occurred, and usually the mestizos were exempted from months of forced hard labor in the farms and the mines. However the main cause of decline of populations of native Indians was diseases such as small pox which the Spanish colonists had brought with them.
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In the far past, I presume? Serfdom. The regressive system of working peasants to near-death while in-turn offering them basic necessities and protection on a set plot of land, owned by a feudal lord.
That it was seen as a way to undermine the Neutrality Acts. In a way, they were right. Lend-Lease basically killed the Neutrality Acts when it was finally put into action and pushed the US a step closer to being a full participant in the war. It wasn't seen as a drain on the US Treasury and isolationists weren't upset over it because of support for the Axis powers -- it wasn't why the Lend Lease program was drafted up in the first place. It also wasn't seen as a direct violation of US law since it still had to be approved by Congress, though isolationists saw it as a violation of their belief that the US shouldn't get involved with foreign conflicts.
