For a half - century, I have been developing a view of free will that is incompatible with determinism and, in the process, attempting to answer the Intelligibility Question about such a free will: Can one make sense of an incompatibilist or libertarian free will without reducing it to mere chance, or mystery, and can such a free will be reconciled with modern views of the cosmos and human beings? In this paper, I discuss recent refinements to my earlier writings on such a view, refinements developed in recent years in response to the large critical literature on my views in the past several decades. My view has usually been designated an event-causal (EC) view of libertarian free will and distinguished from non-causal (NC) and agent-causal...