A copy and paste from the other thread:
It is a long read (1,000+ pages). However it is compelling and difficult to put down. It is about the ‘desk killers’ whose actions have resulted in many millions of brutal deaths rather than them doing the actual physical killings.
A must read for anyone who is interested in history and the backgrounds of these desk killers, the why rather than the what.
The author is a bit of a lefty but he is someone of principles and sound arguments.