What caused Britain and France to go to war (French and Indian War)?

When France's expansion into the Ohio River valley brought repeated conflict with the claims of the British colonies, a series of battles led to the official British declaration of war in 1756.

answer: both considered peasants valued members of society.

explanation: the ancient chinese and indian empires were large asian empires that had the same problems with other big empires, they had to work hard and sometimes fight in order to keep them united, they both relied heavily on their capacity to trade and to send strange and rare items to europe, and had the father as the head of the house hold in both societies, but they didn´t considered pleasants as valued members of their society, they were the bottom of the social pyramid in both of their societies.