The American Philosophical Association

The American Philosophical Society

Association for Symbolic Logic

Australasian Association of Philosophy

The Ayn Rand Institute

The Bertrand Russell Society

British Society for Ethical Theory

British Society for the History of Philosophy

The British Society for the Philosophy of Science

Canadian Philosophical Association

Friedrich Nietzsche Society

History of the Philosophy of Science Working Group

Human Behavior and Evolution Society

The Hume Society

Radical Philosophy Association

Society for Christian Philosophers

Society for Phenomenology and Existential Philosophy

Society for Utopian Studies

Voltaire Foundation