"Aside from anarcho-libertarianism, there are two contending ideas of libertarianism. In its broad sense, libertarianism is equated with civil liberties and political rights—what we usually mean by democracy. Sweden, Japan, and the United States would thus be almost equally libertarian. In its narrow sense, libertarianism is equivalent to classical liberal democracy, adding to democracy the requirement of a free market. India would then be less libertarian than Japan; Israel less libertarian than West Germany. Theoretically, liberal democracies should have significantly less violence than socialist democracies, but both should have significantly less than nondemocracies."

“Well-established democracies do not make war on each other.”

“What is the democratic peace? In the literature on or referring to the democratic peace, this means the idea or fact that democracies do not make war on each other.”

“Libertarian states are by theory not only less violence prone, but when foreign relations includes the perception of other libertarian states, this inhibition becomes a mutual barrier to violence. Their mutual domestic diversity and pluralism, their free and competitive press, their people-to-people and elite-to-elite bonds and relationships, and their mutual identification and sympathy will foreclose on any expectation or occurrence of war between them; violence may occur only in the most extraordinary and unusual circumstances, or at the margins of what it means to be libertarian.”

“The more freedom a people have, the more unlikely the government will murder them. Democratically free governments do not murder their own people.”

“The more constrained the power of governments, the more it is diffused, checked and balanced, the less it will aggress on others and commit democide. At the extremes of Power, totalitarian communist governments slaughter their people by the tens of millions, while many democracies can barely bring themselves to execute even serial murderers.”

“The theory is that democratic systems provide a path to peace, and universalizing them would eliminate war and minimize global, political violence”