In An Introduction to Democratic Theory (1960), Mayo argued that "a consistent and coherent theory of democracy" could be presented interms of a few "distinguishing principles."[4]
(1) Popular control of policy-makers, which required "choosing the policy-makers (representatives) at elections held at more or less regular intervals."[5]
(2) Political equality, which is "institutionalized as the equality of all adult citizens in voting" and, more specifically, that (a) "Every adult should have the vote", (b) "One person should have one vote", (c) "Each vote should count equally", and (d) "the number of representatives elected should be directly proportional to the number of votes cast for them."[6]
(3) Effectiveness of the popular control, which "entails a range of political freedoms. Among them are certainly the freedoms of speech, assembly, and organization, as well as die freedom to run for office."[7]
(4) Majority rule, such that "policies are made by representatives, on the majority principle."[8]
Based on these four principles, Mayo proposed the following "working definition" of democracy: "a democratic political system is one in which public policies are made, on a majority basis, by representatives subject to effective popular control at periodic elections which are conducted on the principle of political equality and under conditions of political freedom."[9]
The value of democracy
Mayo also argued that democracy was valuable for "inherent" and "instrumental" reasons.[10]