This article aims to highlight why R. S. Peters' conceptual analysis of "education" was such an important contribution to the normative field of philosophy of education. In the article, I do the following: 1) explicate Peters' conception of philosophy of education as a field of philosophy and explain his approach to the philosophical analysis of concepts; 2) emphasize several (normative) features of Peters' conception of education, while pointing to a couple of oversights; and 3) suggest how Peters' analysis might be used to reinvigorate a conversation on one central educational aim--that of how we might educate citizens for the 21st century.