 The definition is barebones for several reasons. First, it does not fully capture the normative essence of Jefferson’s description of what is “proper for all conditions of society” in his letter to Dupont de Nemours. Yet it is not normatively neutral, as it speaks of equality of opportunity for each citizen to participate in government and it guarantees equal rights. Second, the definition ignores the partnership of politics and science, which is part of Jefferson’s conception of a republic. Jefferson insisted on periodic revisions of the Constitution at conventions to accommodate changes in the peoples’ will, when suitably informed. Such changes were not arbitrary, but dictated mostly by advances in  science.[21]  Jefferson writes to Samuel Kercheval (12 July 1816), “The laws and constitutions must go hand in hand with the progress of the human mind.” Thus, a republic for Jefferson is essentially progressive and scientific, not static and conservative.