Understanding Reality: Metaphysics in Epistemological Perspective

Philosophical Dialectics: An Essay on Metaphilosophy

Ethical Idealism

Quantitative Studies in Philosophy

Issues in the Philosophy of Religion

Dialectics: A Controversy-Oriented Approach to the Theory of Knowledge

Process Metaphysics: An Introduction to Process Philosophy

Essays in Philosophical Synthesis

Humanistic Philosophizing: Sensibility and Speculation in Philosophical Inquiry

Reason and Religion

Free Will: A Philosophical Reappraisal

Infinite Regress: The Theory and History of Varieties of Change

On Explaining Existence

Predicting the Future: An Introduction to the Theory of Forecasting

Vagaries of Value: Basic Issues in Value Theory

Pragmatism: The Restoration of Its Scientific Roots

Epistemology: An Introduction to the Theory of Knowledge

Axiogenesis: An Essay in Metaphysical Optimalism

Productive Evolution: On Reconciling Evolution with Intelligent Design