This volume, an updated edition of the book previously published under the title "What is Human Revolution," contains several excerpts from Master Ikeda's writings, selected from an immense variety of sources spanning many decades and including speeches, essays, lectures and dialogues. The book explores the principles of Nichiren Daishonin Buddhism and their practical application in daily life, with a special focus on the concept of "human revolution," that inner transformation that is the key to realizing genuine happiness and thus contributing to the building of a peaceful and harmonious society. As Master Ikeda explains, "To accomplish one's human revolution means to open one's eyes wide and look beyond one's narrow everyday world, to strive to devote one's actions to something higher, deeper and greater."