Design thinking is one of the most important ideas of the 21st century. The methodology's impact on product design, how organizations go about solving problems, and how we live our everyday lives has been profound. And its influence has expanded far beyond business and design circles. Universities, nonprofits, even science labs run design sprints based on design-thinking principles. The most popular course at Stanford is one on how to approach your life as a design challenge. The concept is even taught at some elementary schools.