A book I found more detailed than this one was an examination how the systems were both built and administered in the lead up starting well before 1938, and then ultimaltely put to use.<p><a href="https://www.amazon.com/Nazi-Census-Identification-Control-Politics/dp/1592132596" rel="nofollow">https://www.amazon.com/Nazi-Census-Identification-Control-Po...</a><p>The decisions in the process of enumerating people using the Hollerith punch cards, down to which fields on the cards were populated, who was recruited to administer them, the institutions that supported them, and the so-called "blitzkreig" strategy being to facilitate the seizure of church marriage/baptismal, hospital birth, and other municipal records so as to pacify the inhabitants by threatening their families, are all evidence of early intent and design to carry out a genocide. You'd think we would learn. We don't.