Idea (Platonic), [163].

Idealism, [civ]; political, [clxxxvi].

Ideality, [clxviii], [25].

Ideas, [lxix] seqq., [ci] seqq.

Imagination, [72].

Immaterialism, [clii], [12], [45].

Impulse, [95].

Individualist ethics, [cxx] seqq.

Individuality in the State, [139].

Industrialism, [cc], [123].