Frank Herbert

Resourceful people could always find the ingredients for home-made explosives — common things such as sugar and bleaches, quite ordinary oils and innocent fertilizers, plastics and solvents and extracts from the dirt beneath a manure pile. The list was virtually endless, growing with each addition to human experience and knowledge. Even a society… which tried to limit the admixture of technology and new ideas, had no real hope of totally eliminating dangerously violent small weapons. The whole idea of controlling such things was chimera, a dangerous and distracting myth. The key was to imit the desire for violence.
-God Emperor of Dune