How did events of 1765-1787 prove to be the key historical moments in the development of the concept of constitutional government?

Having discovered America in 1492, Columbus lead the way for many other nations to establish colonies there and by 1700 England held 13 colonies on the east coast. These included Pennsylvania,founded by William Penn, Massachusettes,favoured by the pilgrim fathers and Maryland, favoured by Catholics. Early conditions for settlers meant that co-operation was necessary and they formed tight knit communities where everyone pitched in and all had equal share. This established the particularly American concept of 'equal …

…with the help of other British enemies, won the war of Independence. Revolutionary heroes were forced to do in 1787 what they had already done in 1781--establish a government which would be protective of the rights of the people and be faithful to the ideology of the revolution. The Constitution of the United States emerged at the Federal Convention which provided for an elected Congress and a national court system controlled by an almighty supreme court.