Plato, author of the REPUBLIC, is one of the most famous philosophers of all time. Plato explored an astounding range of topics. In his writing he investigated political theory, virtue, language, art, love, mathematics, religion, and more. Though Plato is perhaps best known for other areas of knowledge, he did make important contributions to the long process that built modern science. Even today, in works like the REPUBLIC, Plato leads us to examine what we think we know.