European states were deeply shaped by their colonial experiences

Evidence

This is a radically anti-relational presumption, one failing to understand how much modern and contemporary Europe has been made by its colonial experiences; how deeply instrumentalities of the Holocaust such as concentration camps were products of colonial experimentation; how notions such as racial hygiene can be traced to racially predicated urban planning around sanitation syndromes by colonial regimes; how the operations of emergency law worked out in colonies like India were reimported into European contexts such as Ireland and later Nazi Germany. — David Theo Goldberg, The Threat of Race, 825

Categorization

• XREF: Connects to arguments about colonial reverse-flow — technology and laws devolving back to metropole, echoing the transplant/return pattern seen in military and administrative histories.
• QUESTION: The claim that concentration camps derive from colonial experimentation (presumably Spanish Cuba, British Boer camps) is worth verifying with specific sources.