Psychology students and professionals alike often do not realize that Edmund Husserl addressed core themes of Jean Piaget's genetic epistemology and that the respective works of Piaget and Husserl share various conceptual kinships. This article articulates these kinships and also considers divergences between Piaget's and Husserl's viewpoints. In carrying out the latter, Husserl's philosophical insights are offered as phenomenological critiques of Piaget's theory. Conceptual kinships were anchored in a multideterminant view of cognitive development, a self-regulated perspective on development, attempts to take on Kantian themes in new ways to overcome traditional empirical and rationalist epistemologies, emphases on genesis, world-formation, and world-expansion, an examination of the way science culturally exemplifies world-expansion, and a belief in the convergence of truth and value. Critiques were framed in terms of Piaget's implicit assimilatory bias and his decentration bias. Avenues for approaching Piaget from a humanistic, phenomenological orientation to psychology were also considered.