- Who is: Rahner Hugo in Philosophy
- Who is: Ravitzky Aviezer in Philosophy
- Who is: Robeson Paul in Philosophy
- Who is: Reale Giovanni in Philosophy
- Who is: Russell Stuart J. in Philosophy
- Who is: Rucker Rudy in Philosophy
- Who is: Rohault Jacques in Philosophy
- Who is: Régis Émile in Philosophy
- Who is: Robinson John AT in Philosophy
- Who is: Rahula Walpola in Philosophy
- Who is: Ribot Théodule in Philosophy
- Who is: Robinson Richard in Philosophy
- Who is: Rosen Stanley in Philosophy
- Who is: Rée Jonathan in Philosophy
- Who is: Radhakrishnan S. in Philosophy
- Who is: Romanell Patrick in Philosophy
- Who is: Rotenstreich Nathan in Philosophy
- Who is he: Ritschl Albrecht in Philosophy
- Who is: Rufus of Ephesus in Philosophy
- Who is: Royce Josiah in Philosophy
- Who is: Ramsey Frank P. in Philosophy
- Who is: Riehl Alois in Philosophy
- Who is: Rivadeneira Pedro in Philosophy
- Who is: Reimarus Hermann Samuel in Philosophy
- Who is: Ruhlen Merritt in Philosophy
- Who is: Roemer John in Philosophy
- Who is: Rosen Michael in Philosophy
- Who is: Ravaisson Félix in Philosophy
- Who is: Rosenberg Jay in Philosophy
- Who is it: Rhees Rush in Philosophy
- Who is: Rosmini Antonio in Philosophy
- Who is: Reichenbach Hans in Philosophy
- Who is: Regan Tom in Philosophy
- Who is: Ricoeur François in Philosophy
- Who he is: Roman Augustus in Philosophy
- Who is: Roy MN in Philosophy
- Who is he: Rancière Jacques in Philosophy
- Who is: Rovelli Carlo in Philosophy
- Who is he: Ramus Petrus in Philosophy
- Who is: Rescher Nicholas in Philosophy
- Who is: Rahner Karl in Philosophy
- Who is: Reid Thomas in Philosophy
- Who is: Rand Ayn in Philosophy
- Who is: Ricoeur Paul in Philosophy
- Who is: Rosenzweig Franz in Philosophy
- Who is he: Ryle Gilbert in Philosophy
- Who is: Rawls John in Philosophy
- Who is he: Russell Bertrand in Philosophy
- Who is: Rorty Richard in Philosophy
- What is it: Retrospection in Philosophy
- What is it: Resistance in Philosophy
- What is it: Reaction in Philosophy
- What is it: Redefinition in Philosophy
- What is it: Regression in Philosophy
- What is it: Reformulation in Philosophy
- What is it: Return in Philosophy
- What is it: Rule in Philosophy
- What is it: Redemption in Philosophy
- What is it: Resurrection in Philosophy
- What is it: Reflexivity in Philosophy
- What is it: Retribution in Philosophy
- What is it: Revaluation in Philosophy
- What is it: Recognition in Philosophy
- What is it: Philosophy Review
- What is it: Recommendation in Philosophy
- What is it: Retraction in Philosophy
- What is it: Resignation in Philosophy
- What is it: Rejection in Philosophy
- What is it: Recursion in Philosophy
- What is it: Reminiscence in Philosophy
- What is it: Resilience in Philosophy
- What is it: Restriction in Philosophy
- What is it: Reducibility in Philosophy
- What is it: Rationality in Philosophy
- What is it: Rigor in Philosophy
- What is it: Relevance in Philosophy
- What is it: Reciprocity in Philosophy
- What is it: Answer in Philosophy
- What is it: Resentment in Philosophy
- What is it: Revolution in Philosophy
- What is it: Revelation in Philosophy
- What is it: Responsibility in Philosophy
- What is it: Resolution in Philosophy
- What is it: Renaissance in Philosophy
- What is it: Achievement in Philosophy
- What is it: Reasonableness in Philosophy
- What is it: Reproduction in Philosophy
- What is it: Reification in Philosophy
- What is it: Reflection in Philosophy
- What is it: Representation in Philosophy
- What is it: Relationship in Philosophy
- What is it: Rhetoric in Philosophy
- What is it: Reductionism in Philosophy
- What is it: Rationalism in Philosophy
- What is it: Relativism in Philosophy
- What is it: Realism in Philosophy
- What is it: Rejection of the Superfluous in Stoicism
- What is it: Personal Responsibility in Stoicism
- What is: Voluntary Renunciation in Stoicism
- What is it: Reciprocity in Stoicism
- What is it: Continuous Reflection in Stoicism
- What is it: Respect for Nature in Stoicism
- What is it: Resistance in Stoicism
- What is it: Moral Righteousness in Stoicism
- What is it: Redemption in Stoicism
- What is it: Respect for Others in Stoicism
- What is it: Resolution in Stoicism
- What is it: Moral Reflection in Stoicism
- What is it: Renunciation in Stoicism
- What is it: Seclusion in Stoicism
- What is it: Respect for yourself in Stoicism
- What is it: Realism in Stoicism
- What is it: Rationality in Stoicism
- What is it: Moral Resilience in Stoicism
- What is it: Reevaluation in Stoicism
- What is it: Recognition in Stoicism
- What is it: Restriction in Stoicism
- What is it: Answer in Stoicism
- What is it: Righteousness in Stoicism
- What is it: Rejection in Stoicism