Gauge theory is now recognized as one of the most revolutionary
discoveries in physics since the development of quantum mechanics. This
primer explains how and why gauge theory has dramatically changed our
view of the fundamental forces of nature. The text is designed for the
non-specialist. A new, intuitive approach is used to make the ideas of
gauge theory accessible to both scientists and students with only a
background in quantum mechanics. Emphasis is placed on the physics
rather than the formalism.