In the making of Mayflower Compact, it drew two strong traditions. First was the conception of the social contract and the belief in the covenant. The Pilgrims used covenant to set up congregations while the Mayflower Compact is a covenant that the people agreed upon.
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Canals, Reservoirs, Dams
(I’m not 100% sure, but though they used flooding to their advantage it wasn’t a form of water control)
Because they wanted religious freedom from the British government