Simplify the following text for a Grade 14 native English-speaking person.
Original: The purpose of the proclamation was to organize Great Britain 's new North American empire and to stabilize relations with Native North Americans through regulation of trade , settlement , and land purchases on the western frontier .
Simplified: The purpose of the Proclamation was to organize Britain 's large North American empire , and to make relations with Native Americans better and more and more stable by controlling trade , settlement , and land purchases on the western frontier .