Science and everyday experience increasingly demonstrate that ours is a dynamic, interconnected, relational universe. It was the great insight of Alfred North Whitehead that we need a philosophy to match this understanding. That he succeeded in this is hampered by the complexity of his ideas and the words he used to describe it. In What Is Process Thought, Jay McDaniel easily overcomes this difficulty. Using metaphor, imagery, and examples from everyday life, McDaniel brings the "aha" experience of understanding to readers, whether process thought is new to them or already familiar. Old-order thinking has brought us to the precarity of geopolitical crises and climate change. If we are to survive, we must make the shift from substance-mechanistic thinking to process-relational thinking. This little book is a gateway to that great and necessary shift.