American traditions and the American ethic require us to be truthful, but the most important reason is that truth is the best propaganda and lies are the worst. To be persuasive we must be believable; to be believable we must be credible; to be credible we must be truthful. It is as simple as that.
Bio: Elihu Root was an American lawyer and statesman who served as the Secretary of War under two presidents, including President Theodore Roosevelt. He moved frequently between high-level appointed government positions in Washington, D.C.