Ideas and Opinions is the definitive collection of Einstein's writing, including scientific writings that are the foundation for modern physics and of our modern world, extracts from his speeches on subjects as diverse as atomic war, religion and human rights and letters that show the personal side of one of the world's greatest, and most public, intellectuals. Einstein's writings re-defined mankind's ideas about the universe. His theory of relativity changed how we think of space and time while his proposal that energy and matter are interchangeable, summed up as E = mc², became the most famous mathematical equation in history. Ideas and Opinions collects Einstein's thoughts and beliefs on every subject and displays his remarkable ability to penetrate to the heart of a subject, an ability that is as apparent in his scientific writings as in his more personal writings. He had the rare gift to make complex problems seem simple, while writing entertainingly on every subject, revealing his personality as much as his thoughts. It is as close to Einstein's autobiography as we will get, and captures his witty, anarchic but thoughtful personality.