The Daring Philosophers: Brief essays on Descartes, Spinoza, Kant, Rousseau, Nietzsche, and Sartre

Many are the philosophers who have proposed ideas, explanations, and solutions to the riddles of the universe. Few are the ones who have left us definitive answers. I have chosen six philosophers because their ideas are so daring and yet well argued that remain unrefuted despite the attempts by lesser luminaries of philosophy.