Humans enjoy social contact and feeling needed in a sense.
Answer:
Early humans migrated to America crossing the Bering Strait, which back then was a wide swath of land, about 15,000 years ago.
Answer:
The main cause of Spain's crisis was the housing bubble and the accompanying unsustainably high GDP growth rate. The ballooning tax revenues from the booming property investment and construction sectors kept the Spanish government's revenue in surplus, despite strong increases in expenditure, until 2007.
The inflation or increase of taxes, spain exporting goods to other countries which made spain's enemies rich, and the dutch revolt weakened spain.
