Integral Philosophy, as articulated by Ken Wilber, relates to other philosophical theories by presenting itself as a metatheory that seeks to include, organize, and transcend them rather than simply compete with or negate them. It does so by treating most schools of thought as offering “partial truths” that highlight specific dimensions of reality—such as language, power, rationality, or pure consciousness—while overlooking others. Within this vision, Western analytic and continental philosophies, phenomenology, existentialism, German Idealism, process thought, and postmodernism are all acknowledged as significant yet incomplete contributions. Integral Philosophy attempts to situate these perspectives within a broader developmental and structural map, claiming that each finds its proper place when seen as one moment in a larger unfolding of consciousness and culture.

A central feature of this relationship is the integration of Eastern non-dual traditions—such as Advaita Vedānta, Mahāyāna Buddhism, and Dzogchen—into a comprehensive framework that also embraces Western rationality, ethics, and science. Non-dual realization is treated as a profound state and stage of awareness that does not negate relative perspectives but “transcends and includes” them, allowing the ultimate unity of all existence to be recognized without dismissing the relative reality of forms. In this way, Integral Philosophy attempts an East–West synthesis in which contemplative insight and empirical inquiry are not adversaries but complementary dimensions of a single, evolving reality.

This integrative stance extends to developmental psychology, constructivist theories, systems theory, and complexity science. Thinkers such as Piaget, Kohlberg, and Graves are interpreted as describing levels or waves of cognitive, moral, and psychosocial development, which Integral Philosophy then weaves into a more encompassing developmental backbone that runs from pre-personal through personal to transpersonal stages. Systems theory and the notion of holons—entities that are simultaneously wholes and parts—are employed to articulate how individuals, cultures, and ecosystems form nested, evolving structures. Other philosophical systems are thus read as expressions of particular developmental stages and system-level emphases, each illuminating a piece of a much larger pattern.

At the same time, Integral Philosophy takes seriously the critiques raised by postmodern and critical theories regarding power, context, and the dangers of totalizing narratives. It attempts to absorb these insights while still affirming the possibility of cross-cultural developmental patterns and structural regularities, presenting itself as a “post–postmodern” move that combines deconstruction with reconstruction. Through its multi-perspectival approach—attending to subjective, intersubjective, objective, and interobjective dimensions, along with multiple levels, lines, states, and types—it portrays itself as a hierarchical-pluralist framework. In this sense, its relationship to other philosophical theories is both honoring and critical: they are seen as indispensable yet partial, awaiting integration into a more comprehensive vision that gives a privileged place to non-dual realization as the deepest expression of an evolving Spirit.