Complex sentence: For him, the key question was how actively the rulers ruled and for this reason he called for a drastic reduction of the state and welcomed Mussolini's rule as a transition to this minimal state so as to liberate the "pure" economic forces.
Split into simpler sentences: For him, the key question was how actively the rulers ruled. For this reason he called for a drastic reduction of the state and welcomed Benito Mussolini's rule as a transition to this minimal state so as to liberate the "pure" economic forces.