What has the nonaggression principle to do with bitcoin trading? In the Introductory page of the book 'Attack of the 50 foot Blockchain', the author says (in reference to Ross Ulbricht) : 


  A young physics student starts a revolutionary new marketplace based on
  the nonaggression principle, immune to State coercion.


What does the author actually mean by that please?
Book author here! It's because Ulbricht subscribed to the tenets of Anarcho-Capitalism, and founded his drug market as an exercise in ideology. As it happened, the FBI didn't find this a compelling excuse.