Best known for his work on childhood cognition, Jean Piaget wrote Insights and Illusions of Philosophy as an intellectual reckoning with philosophy itself. 

The book asks a provocative question—what happens when philosophical problems are examined alongside the empirical study of how humans actually come to know things? Piaget moves through major philosophical traditions and argues that many enduring philosophical puzzles arise from treating conceptual systems as static rather than developmental.

Piaget proposes that philosophy’s real value lies in clarifying problems, while scientific inquiry—psychology in particular—must take responsibility for explaining how knowledge structures evolve.

It’s a compact but ambitious book, sitting at the intersection of epistemology, psychology, and the history of ideas.