No man is an island, is something we say to express the fundamental connection we hold with one another. The emotions we share, and the events of our lives which we communicate to one another creates a network of experiences that none of us can escape. Yet in another sense, each person alive is an island unto themselves, remote and isolated from the world at large by a parlor trick that cuts more finely, and more severely than the sharpest of knives. This sense in which we are divided, and which separates us from one another, is a gulf in space, time, and possibility that we call perspective. In the following pages I want to take you through an exploration of the concept of perspective, and all the different ways in which we use the word. In art, it describes the production of illusory depth. In any conflict, it describes which side one finds themselves allied with. In physics, it describes properties of time and space's flow. In society, it describes the roots of authority we hold over one another, or the blinders of cultural attachment. In biology, it presents the hardest of problems we face today, drawn from a theory of the world constructed four centuries ago. In philosophy, perspective faces us with the challenge of understanding the nature of ourselves, and the worlds we live in. Our hope is that we may meet this challenge in a way which properly respects our understanding of perspective in all these ways in which it is understood, and which accounts for the presence of perspective in all these ways in a sense which is explicable, not esoteric. This hope stems from an intuition regarding perspective itself, that in all the ways we understand it to exist, it describes one and the same underlying feature of our reality.