The theme of this book is the appropriate methodology for the study of the history of life on earth. In particular, it focusses on the interplay between form and structure and their importance for understanding the way in which life on earth has evolved. Includes an introduction by Stephen Jay Gould, expounding his unique philosophy of history concerning the nature of long-term and short-term evolutionary processes.The theme of this book is the appropriate methodology for the study of the history of life on earth. In particular, it focusses on the interplay between form and structure and their importance for understanding the way in which life on earth has evolved.