<p> The evolving complexity of our engagement with the world and the many challenges we now face as a numerous and technologically advanced species require us to develop a vision of reality and a way of participating within it that honors its dynamic complexity, creative potentiality, and ecological sensitivity. Drawing on the thought and vision of three inspiring and transformative thinkers who each sought to bridge the growing gap between the richness and complexity of lived experience and the barrenness and disconnection of scientific materialist philosophy&mdash;Carl Gustav Jung, Alfred North Whitehead, and Rudolf Steiner&mdash;this dissertation seeks to elaborate a relational, participatory, and evolutionary vision of reality and human existence in which individuality, relationality, and creative expression are understood as interdependent dimensions of a paradoxically single and manifold spiritual reality and evolutionary process. It then examines some of the essential implications of this emerging vision, with particular emphasis on the importance of the aesthetic, moral, and spiritual dimensions of human creative participation, including the existential participation that is inherent in thought and experience. This vision thus also suggests a fundamental shift in epistemological perspective, so that thinking and knowing are understood as inherently relational and creative acts, which both reflect and transform the realities they engage, and which are characterized by the moral, aesthetic, and spiritual consequences that accompany all influential action.</p>