Year 415 (CDXV) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Honorius and Theodosius (or, less frequently, year 1168 Ab urbe condita). The denomination 415 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Stephen Richards Covey (born October 24, 1932 in Salt Lake City, Utah) is the author of the best-selling book, The Seven Habits of Highly Effective People. Other books he has written include First Things First, Principle-Centered Leadership, and The Seven Habits of Highly Effective Families. In 2004, Covey released The 8th Habit. In 2008, Covey released The Leader In Me—How Schools and Parents Around the World Are Inspiring Greatness, One Child at a Time. He is a professor at the Jon M. Huntsman School of Business at Utah State University.

Covey is the son of Stephen Glenn Covey and his wife Irene Louise Richards. Louise is the daughter of Stephen L Richards, an apostle and counselor in the first presidency of the Church of Jesus Christ of Latter-day Saints under David O. McKay.^{[citation needed]}

Covey earned a B.S. in business administration from the University of Utah, an MBA from Harvard University, and a Doctor of Religious Education (DRE) from Brigham Young University. Covey is a brother of Pi Kappa Alpha International Fraternity. He has been awarded ten honorary doctorates.

John Calvin Maxwell (born 1947) is an evangelical Christian author, speaker, and pastor who has written more than 60 books, primarily focusing on leadership. Titles include The 21 Irrefutable Laws of Leadership and The 21 Indispensable Qualities of a Leader: Becoming the Person Others Will Want to Follow. His books have sold more than nineteen million copies, with some on the New York Times Best Seller List, and translations in over fifty languages.

John C. Maxwell was born in Garden City, Michigan in 1947. Maxwell followed his father into the ministry, completing a Bachelor's degree at Ohio Christian University in 1969, a Master of Divinity degree at Azusa Pacific University, and a Doctor of Ministry degree at Fuller Theological Seminary. He currently resides in South Florida with his wife, Margaret.

For over 30 years, Maxwell has led churches in Indiana, Ohio, California, and Florida. After serving as senior pastor for 14 years, in 1995 he left Skyline Church, near San Diego, to devote himself full-time to speaking and writing. However, in 2004, he returned to congregational ministry at Christ Fellowship in Palm Beach Gardens, Florida, where he is currently a teaching pastor. On November 16, 2008, he began serving as a guest pastor at the famous Crystal Cathedral in Orange County, California. Maxwell's mentor, Robert H. Schuller, has had a variety of noted evangelical pastors preach at his megachurch since his son, Robert A. Schuller, resigned as senior pastor in 2008. Maxwell has returned to preach at the Crystal Cathedral several times and his messages are broadcast worldwide on the Hour of Power television program, seen by an estimated 20 million viewers.

Morio Higaonna (Higaonna Morio, born December 25, 1938) is a prominent Okinawan karate practitioner who is the founder and Chief Instructor of the International Okinawan Goju-ryu Karate-do Federation (IOGKF). He is a holder of the highest rank in Goju-ryu karate, 10th dan. Higaonna has written several books on Goju-ryu karate, including Traditional Karate-do: Okinawa Goju Ryu (1985) and The history of Karate: Okinawan Goju Ryu (2001). Martial arts scholar Donn Draeger (1922–1982) reportedly once described him as "the most dangerous man in Japan in a real fight."

Higaonna was born on December 25, 1938, in Naha, Okinawa. He began studying Shōrin-ryū karate at the age of 14 with his father and then with his friend Tsunetaka Shimabukuro. It was Shimabukuro who recommended that Higaonna learn Goju-ryu karate at Chojun Miyagi's garden dojo (training hall). In the late 1950s, he began training under Ei'ichi Miyazato (the most senior student of Chojun Miyagi, 1888–1953, who founded the Goju-ryu style) and An'ichi Miyagi (who was reportedly like an adopted son of, though not related to, C. Miyagi).