"We tend to think of the problems of globalization and cultural identity as peculiar to our times. In fact they are rooted in ancient problems of civic belonging."

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1. 0 is a number. 2. The immediate successor of a number is also a number. 3. 0 is not the immediate successor of any number. 4. No two numbers have the same immediate successor. 5. Any property belonging to 0 and to the immediate successor of any number that also has that property belongs to all numbers.

— Giuseppe Peano