Introduction.- PART I 1894-1918.- Chapter 1 - Roots.- Chapter 2 - Education.- Chapter 3 - A young Philosopher.- PART II 1919-1939.- Chapter 4 - A Mathematician at work.- Chapter 5 - Reflections on Science and Technology.- PART III. 1940-1945.- Chapter 6 - Military Research Projects.- PART IV - 1946-1964.- Chapter 7 - After Hiroshima and Nagasaki.- Chapter 8 - The book Cybernetics.- Ch. 9 - After Cybernetics.- Conclusions.- References.- Index of...