Answer:
Colonialism.
Explanation:
The empires of Europe i.e. Great Britain, Spain, Portugal, France and to a lesser extent Belguim, Italy, Netherlands & Germany conquered the majority of the world and suppressed native cultures and languages by forcing European ideals and languages on them.
Madagascar because the others in the list are not islands. Kilimanjaro is a mountain, mozambique is a country, and victoria is a lake.
