Abstract. Is justice necessary for peace? There can be no justice while people have unresolved grievances, but peace is more than the absence of strife. It is harmony. Justice is the principles of equality and evenhandedness that command and prohibit the use of force in resolving conflicts. Justice is not necessary for peace, but it does facilitate it. Conservative, majoritarian, egalitarian and contractarian efforts to specify justice all fail to respect persons in crucial ways and cannot be expected to lead to peace. The justice that leads to peace is classical liberalism, with its insistence that each person own himself or herself, augmented by the principle of equal rights to the opportunities provided by nature, as advanced by Henry George.