The people who run empires present justifications showing that it is a win-win situation for all involved. When I studied history in high school and my first years in college, colony acquisition seemed like buying real estate from a willing seller.
In my junior year, I learned Latin American history and discovered how brutal it all was. All empires are run much like the Soviet Empire from 1939 to 1991.
I invite you to see the British Empire from a critic.