"Necromancer" by Gordon R. Dickson Chapters 1 & 2

"At the crisis point of humanity's near future, the mysterious cult called the Chantry Guild arose. It was their contention that the computerized world society would fall of its own weight - that it would reduce Earth's billions to a mass of faceless biped ants. They raised the call of destruction. They called upon the alternate laws of science - the powers of nature men had once called witchcraft, The necromantic anti-science of the past brought forward to save the world by destroying it! Gordon Dickson's astonishing novel of the not-quite-human hero who turned the tide for the world - and set the conditions for the cosmic migration that lead to the Dorsai - is one of his most effective and most unusual."