This document provides a history of network marketing from its origins in 1945 with Nutrilite Vitamin company to the present day. It describes how Nutrilite founders Carl Rehnborg, Lee Mytinger and William Casselberry created the multi-level marketing concept. It then discusses the growth of the industry in subsequent decades, challenges from regulatory bodies, and the rise of major companies like Amway. The document concludes by noting that network marketing has grown to a $125 billion industry involving over 150 million distributors globally while still involving less than 1% of the population.