Dr. Don Dinkmeyer, Sr. was an influential American psychologist and educator renowned for his pioneering work in Adlerian psychology. He is best known as the co-developer of the Systematic Training for Effective Parenting (STEP) program, which has helped millions of parents worldwide. Throughout his career, he authored numerous books and articles, focusing on topics like child guidance, counseling, and personal growth. His contributions significantly impacted the fields of family counseling and parent education, emphasizing encouragement and mutual respect within family dynamics.