http://isprwrxiklpwwy2lzcpuq5y25dnboijl2ftqewcdfxxci2dvz4waxxid.onion/mediawiki/Books/Influence
So, he spent 3 years infiltrating the ranks of compliance professionals -- people whose entire livelihood depends on persuading you -- salespeople, fundraisers, marketers, recruiters etc. The principles of persuasion have the ability to produce an automatic, unthinking response from people, i.e. mindless compliance.