  Charles Sanders Peirce was born on September 10, 1839 in Cambridge, Massachusetts, and he died on April 19, 1914 in Milford, Pennsylvania. His writings extend from about 1857 until near his death, a period of approximately 57 years. His published works run to about 12,000 printed pages and his known unpublished manuscripts run to about 80,000 handwritten pages. The topics on which he wrote have an immense range, from mathematics and the physical sciences at one extreme, to economics, psychology, and other social sciences at the other extreme.