Therein, the the Crown declared the colonies SUBORDINATE to Britain, thus, there was no 'secession'. Those in America were not equal citizens of GB: http://www.ushistory.org/declaration/related/declaratory. The historical question is, in reality, why GB bothered to hold on to the colonies. Prior to the French & Indian War, some Lords considered the land across the sea more of a burden than an asset. After the war, we were a source of revenue. Thus arrived the year of our discontent, 1776.