Although Leibniz is universally regarded as the greatest German philosopher before Kant, his work as a political and moral philosopher is almost entirely neglected in the English-speaking world, where he is seen chiefly as a metaphysician, mathematical logician, and co-discoverer of calculus. Yet Leibniz' doctoral degree was in law and jurisprudence, and he served throughout his life as a judge and a diplomat; he was a valued political--legal...