His manifesto is worth reading. Although he was obviously a twisted man many of his predictions for the future were eerily prescient. http://editions-hache.com/essais/pdf/kaczynski2.pdf
I don't suppose anyone has a short summary?
He also is definitely not any kind of primitive man utopia shill, that's why he rants in the beginning against 'green anarchy' type ideology. He is more of an evolutionist saying even if we returned to primitive life before the industrial revolution we would at least still be human and would have to accept all kinds of terrible things that come with primitive life as the alternative is being a spiritless organism serving machines (again his ideology not mine).