Concurrent majority thumb|upright|Undated photograph of Calhoun|alt=Full profile in oval frame, black scarf under quilted sweater, right arm draped over chair arm holding rim of hat. Austere look. Calhoun's basic concern for protecting the diversity of minority interests is expressed in his chief contribution to political science—the idea of a concurrent majority across different groups as distinguished from a numerical majority. A concurrent majority is a system in which a minority group is permitted to exercise a sort of veto power over actions of a majority that are believed to infringe upon the minority's rights.
Concurrent ma.jority thumb|upright|Undated photograph of Calhoun|alt=Full profile in oval frame, black scarf under quilted sweater, right arm draped over chair arm holding rim of hat. Austere look. Calhoun's basic concern for protecting the diversity of minority interests is expressed in his chief contribution to political science—the idea of a concurrent majority across different groups as distinguished from a numerical majority. A concurrent majority is a system in which a minority group is permitted to exercise a sort of veto power over actions of a majority that are believed to infringe upon the minority's rights