Through the next several decades, from the 1910s through the 1930s, Kazantzakis traveled around Greece, much of Europe, northern Africa, and to several countries in Asia. Countries he visited include: Germany, Italy, France, The Netherlands, Romania, Egypt, Russia, Japan, and China, among others. These journeys put Kazantzakis in contact with different philosophies, ideologies, lifestyles, and people, all of which influenced him and his writings. Kazantzakis would often write about his influences in letters to friends, citing Sigmund Freud, the philosophy of Nietzsche, Buddhist theology, and communist ideology and major influences. While he continued to travel later in life, the bulk of his travel writing came from this time period.