Concepts: Butlerian Jihad, Orange-Catholic Bible, Great Convention, Planetary Ecology, Zen-Sunni religion, Mentat, Prescience, Golden Path, Spice ... Actors: Actors: Emperor (House Corrino) - its might based on its ruthless military (Sardaukars) Landsraad Combine Honnete Ober Advancer Mercantiles (CHOAM) The Guild Fremens (an undefined variable) Ixians (Mechanists of a sort) and Tleilaxu (Shapers of a sort)