People in America hold a variety of competing and incompatible worldviews that are so different that it can be difficult to communicate about important issues in life. Portals offers a brief survey of seven of the major worldviews that shape American culture today. The book begins with an introduction that explains the idea of worldview and gives some suggestions for how to use the book. It then has chapters on historic Christianity, secular naturalism, postmodernism, Islam, Eastern religions, the New Age movement, and the Gaian worldview. The book concludes with an epilogue that looks ahead at where each of the worldviews seems to be heading, and points to new worldviews that are developing and that may emerge as important ways of seeing the world in the coming years. Intended primarily as a guide for Christians to understand their neighbors, this book can benefit anyone interested in bridging the divide between competing worldviews and entering the mental world of the people around us.