You might be interested in some previous threads on the benefits of imperialism and colonialism for the colonized:

• We all hear about the bad sides of Imperialism, did the imperial empires ever do any good for the countries they colonised? - 138 comments, over 1 year old.
• Many answers involving India, some on Africa, and a few on China and Japanese colonialism.
• Was imperialism actually a good thing in some places? - 40 comments, over 2 years old.
• This thread is lighter on the facts but delves into what makes this a controversial and difficult to parse subject in the modern day.