Know of any good books documenting these deliberate actions you talk about or are you speaking more generally?
1. Forbid people from speaking their own languages or practicing their own cultures/religions (slavery)
2. Relocate children to schools of the subjugating culture or prevent them from being educated (happened during slavery)
3. Make drugs and intoxicants widely available (CIA bringing drugs into black neighborhoods)
4. Enslave people
5. Post-slavery, give them fewer rights and a caste-stratified society (Dread Scott)
6. When/where these cultures build wealth, destroy it (Tulsa massacre)