Colonialism (noun)

1. The policy or practice of acquiring control over and exploiting other countries or territories.
2. The exploitation and control of one country by another.

Origin:

Mid 19th century: from colonial + -ism.

Examples:

1. The legacy of colonialism still affects many countries today.
2. The colonialism led to the exploitation of resources and people in the colonies.
3. The colonialism resulted in the loss of cultural heritage and traditions.
4. The colonialism created a power imbalance between the colonizer and the colonized.
5. The colonialism was a dark period in world history that left lasting consequences.