The central issue here concerns whether Being as explored by Martin Heidegger in Being and Time is constituted spatiotemporally. As such this project has two interlinked objectives. One objective is to supply conceptually plausible answers to Heidegger’s unanswered questions regarding the temporality of Being, which he raised at the very end of Being and Time. In response I argue that each individual human being is constituted as a Space-Time-Event-Motion (STEM) containment-field embodied entity. Heidegger situates Dasein (human existence) in a temporal (...) stream moving towards the nothingness of death but all the while separating being and time as two distinct phenomena rather than coexistent. I demonstrate why this was a crucial error in Heidegger’s thinking. The second objective deals with the sense of authentic being developed by Heidegger. The spatiotemporal nature of one’s life for Heidegger is understood from the standpoint of Being-in-the-world, as an engaged participant, coexistent with the world, so that contextually it is through this engagement in recognition of this facticity or thrownness that one comes to recognise one’s own authentic self. Somewhat problematic is the coexistent phenomenological recognition that one does not live in isolation and as such one may question what of the contingent, constraining and influencing factors that shape one’s sense of self particularly against the backdrop of self-other relations. This project is situated methodologically within Process Philosophy, and it is from this perspective that draws attention to the role of human agency in which individuals are spatiotemporally construed in terms of Space-Time-Event-Motion (STEM) entities. (shrink)