In europe when you were 40 you were considered old ,bandits and robbers ruled the night , there was no law enforcement .
It motivated them to fight back and not let them be ruled unfairly.
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The British victory in the French and Indian War had a great impact on the British Empire. Firstly, it meant a great expansion of British territorial claims in the New World. But the cost of the war had greatly enlarged Britain's debt. Moreover, the war generated substantial resentment towards the colonists among English leaders, who were not satisfied with the financial and military help they had received from the colonists during the war. All these factors combined to persuade many English leaders that the colonies needed a major reorganization and that the central authority should be in London. The English leaders set in motion plans to give London more control over the government of the colonies and these plans were eventually a big part of the colonial resentment towards British imperial policies that led to the American Revolution.
On August 25, 1916, President Woodrow Wilson signed the act creating the National Park Service, a new federal bureau in the Department of the Interior responsible for protecting the 35 national parks and monuments then managed by the department and those yet to be established.