No wonder so many philosophers walked. Socrates, of course, liked nothing more than strolling in the agora. Nietzsche regularly embarked on spirited two-hour jaunts in the Swiss Alps, convinced “all truly great thoughts are conceived by walking.” Thomas Hobbes had a walking stick custom made with a portable inkwell attached so he could record his thoughts as he ambled. Thoreau regularly took four-hour treks across the Concord countryside, his capacious pockets overflowing with nuts, seeds, flowers, Indian arrowheads, and other treasures. Immanuel Kant, naturally, maintained a highly regimented
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