Answer: "social proof" .
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Voters can be overwhelmed and vote by randomly guessing.
It puts too much of the onus of learning about the issues and candidates on voters.
It can include, state, local, municipal, national and federal candidates.
To start a colony, gold and riches, silks and spices, to claim land, and to gain power
Well when people didn't have trucks and cars and things so they had to use the canals and rivers to transport trade.
hope it helllps ;)
