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)