My grandfather was head of the main construction "trust" in Kiev and a member of the communist party. Thus he was head of all construction in the city. He was part and parcel of the system that all together constituted what really was rightfully called the Evil Empire. A true prison. Was he evil? No. For him it was his job. He had a passion for construction and building. But he did nothing to subvert the Soviet way of life, derived benefit from it, and most likely thought it was correct. Multiply that by millions and you get your average society, whether individuals are contributing to a Soviet Socialist State or a Western Society. You can't just run a country by fear. Many people must be on board, from the oligarchy to the top level beaurocrats to the mid level apparatchiks to the common man. Society is ruled by broad social currents. Mao didn't personally kill 65 million people. He and many other people set up an environment that manipulated common human features—cult worship, paranoia, herd mentality—and steered them in an evil direction. But the mob, the herd mentality was the grand perpetrator. And you'll find that common to all groups everywhere. That's why the Federalist Papers are so beautiful. Any group can slip from a civil society to a nightmare wreck.
PS Thank you from the recommendations. I've tried some of those and couldn't get in to them. Will try again maybe it's the right time.
PSS > However, it does not perform the role you suggest.
I think that depends on who's looking, and at what. The OP is what really got me. Can't imagine having an app called "Trace Viewer" on my phone. Really brought me in to that day to day. And maybe my perspective on NK is different because I was born in the Soviet Union, and despite leaving at age 5, that has been the backdrop to my entire life.