Hobbes was greatly influenced by the events of the

Civil War Period (1642–1651)

The English Civil War began in 1642, and when the royalist cause began to decline in mid-1644, many royalists came to Paris and were known to Hobbes. This revitalised Hobbes's political interests and the De Cive was republished and more widely distributed.

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explanation:

these civilizations were located around fertile rivers, where they could produce an abundance of crops