Mark Yarnell is a best-selling author, an accomplished speaker and international business leader, with a focus on network marketing. He and his wife Valerie Bates mentor thousands of potential entrepreneurs in home-based businesses. Yarnell is the founder and President of 21st Century Global Network, LLC, which is a multi-level marketing (MLM) that partners with American Technologies Group (ATG) and Integral Health, Inc. (IHI).

Using his MLM-based business and marketing plan, Mark Yarnell has developed a successful international distribution organization exceeding 300,000 marketing representatives in 21 countries, which produces millions of dollars worth of income. He established and led the distributor network of the 21st Century Global Network, which has sold products, such as NuSkin, “IE Crystas” and Oxyfresh.

Upline Magazine, which is a publication for network marketing businesses and entrepreneurs, named him "The Greatest Networker in the World." In 1997, he was presented with the Leadership Award and Distributor of the Year Award from the Multi-Level Marketing International Association (MLMIA), which is a not for profit trade organization dedicated to advancing MLM business trades.

Mark Yarnell was the first and only network marketing business professional to become a monthly contributing writer and editor to SUCCESS magazine. Through his dedication to the network marketing business model and the desire to see others succeed, he co-founded the first college-level network marketing course with Dr. King of Harvard University, which Yarnell teaches at the University of Houston. The class is also taught by faculty at the University of Illinois at Chicago, as well as in Seoul, Korea.

He has given speeches and delivered presentations throughout North America, Asia and Europe. Mark Yarnell authored and published several best-selling books, which includes Your First Year in Network Marketing: Overcome Your Fears; Experience Success, and Achieve Your Dreams!; Self Wealth, Your Best Year in Network Marketing and Multi-Level Marketing: The Definitive Guide to America’s Top MLM Companies.

He has supported and founded a variety of charitable organizations, which includes The Eagles, a literacy organization for prison inmates; and the School of Sobriety, a free treatment program in Nevada for drug addicts and alcoholics. He earned the Nevada Philanthropist of the Year Award from the Washington Times for his charitable work. He was recognized internationally with the American Dream Award and was indoctrinated into the Network Marketing Hall of Fame.

Although Mark Yarnell has been referred to as a network marketing icon, there are controversies surrounding his MLM ventures and a great deal of speculation about the credibility of his network marketing distribution businesses. Some have asserted that the MLM-based business model in and of itself is a scam and that the majority of them are prone to serious misrepresentations. Multi-level marketing (MLM) or “network marketing” is a product-based pyramid scheme or “chain selling” network, in which the goal is for the distributor to become financially independent by selling the company’s products. The majority of people find network marketing attractive due to the opportunity to find independence as a result of being self-employed, in addition to the promise of financial freedom.

There are cases for and against whether MLMs are legitimate or deceptive trades. However, Mark Yarnell has enabled thousands of people to accomplish their goals and attain financial success due to his dedication and the pursuit of the American dream. Through his Holy Grail system, he, alongside his wife, coach others on how to achieve success in network marketing by recruiting and training others, and growing and leading their distribution networks. Yarnell’s many MLM-based business endeavors have unarguably attained both national and international recognition.