Short grasses that grow naturally on steppes provide grazing for cattle, goats, horses, camels, and sheep. Sometimes steppes are overgrazed, which occurs when there are more animals than the land can support. When the short grasses of the steppe are plowed under for agriculture, the soil can erode very quickly.
The Mexican society wasn't united, since they were constantly fighting with each other. Since soldiers were killed, they also lost military power. When the Spanish arrived, they had a strong military, but also diseases, which killed Mexican soldiers. That made the home society vulnerable.
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It required all escaped slaves to return to their masters and that any free states had to cooperate with this law.
Khanacademy.org overview hope this helps :)
In the roaring twenties, a surging economy created an era of mass consumerism. I think