Below you will find downloadable pdf files for some key Culture of Thinking resources. The research and theoretical basis for the Cultures of Thinking work can be found in my book, Intellectual Character.
People have known about coal since ancient times. Aristotle, the Greek philosopher, wrote about it in one of his books - Meteorology - during the 4th Century B.C. By the 13th century, people in Europe were commonly using this natural resource. By the 14th century, Hopi Indians had discovered its value.