Power to do so (I just got over this topic in my class)
The proclamation of 1763 came out of the Treaty of Paris after the Seven Years War, so the British could incorporate lands ceded by the French as a result of their loss. The stationery soldiers were to establish a boundary between the new lands and the lands of the Native American, and to protect the colonizers forms their attacks.
The colonizers were unhappy because they lost the chance to get lands for their own, and because they couldn't commerce freely with the Native. Britain could have left the colonizers to adventure in strange lands and be massacred by the Native Americans, but couldn't afford to lose power over this new lands, over the colonizers and the Native.
One of the reasons why there was such a strong anti-catholic sentiment in America during the 1800s, was because many Protestants thought they were stealing jobs and disobeying the law.
