This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book addresses open theism from the standpoint of other concerns in philosophical theology. It argues against limited foreknowledge versions of open theism. The book shows that arguments that treat causal determinism and divine knowledge in the same way are mistaken. It suggests that origins essentialism conflicts with most versions of open theism, which endorses the Asymmetry Thesis. The book discusses the typical openness position which rests on indeterminacy. It describes Greg Boyd's arguments that open theism helps address the problem of evil by making God more trustworthy to struggling believers. The book also describes the core components of the Molinist and open theistic accounts of providence, Perszyk distinguishes different soteriological problems of evil and considers what Molinists and open theists can say about them.