- Who is it: Santillana, Giorgio de na Filosofia
- Who is: Smith, John E. in Philosophy
- Who is: Sraffa, Piero in Philosophy
- Who is: Suárez, Francisco in Philosophy
- Who is it: Stace, WT in Philosophy
- Who is: Svevo, Italo in Philosophy
- Who is it: Strauss, Leo in Philosophy
- Who is it: Simone, Nina in Philosophy
- Who is it: Sen, Amartya in Philosophy
- Who is it: Searle, John in Philosophy
- Who is it: Scoto, Michele in Philosophy
- Who is: Scholasticus, Johannes in Philosophy
- Who is it: Scotism in Philosophy
- Who is it: Sosa, Ernest in Philosophy
- Who is: Scholz, Heinrich in Philosophy
- Who is it: Strawson, PF in Philosophy
- Who is: Sciacca, Michele Federico in Philosophy
- Who is it: Schmitt, Carl in Philosophy
- Who is: Severinus, Boethius in Philosophy
- Who is it: Spivak, Gayatri Chakravorty in Philosophy
- Who is: Sankara in Philosophy
- Who is: Siger of Brabant in Philosophy
- Who is: Schutz, Alfred in Philosophy
- Who is: Scheler, Max in Philosophy
- Who is: Sophocles in Philosophy
- Who is it: Spencer, Herbert in Philosophy
- Who is it: Schlick in Philosophy
- Who is: Saadiah Gaon in Philosophy
- Who is: Steiner, Rudolf in Philosophy
- Who is: Scotus, Duns in Philosophy
- Who is he: Skinner, BF in Philosophy
- Who is: Scheler in Philosophy
- Who is: Singer, Peter in Philosophy
- Who is he: Spengler in Philosophy
- Who is: Smith, Adam in Philosophy
- Who is: Searle in Philosophy
- Who is: Simmel in Philosophy
- Who is: Schelling in Philosophy
- Who is: Saussure in Philosophy
- Who is: Sextus Empiricus in Philosophy
- Who is it: Sidgwick in Philosophy
- Who is: Santayana in Philosophy
- Who is: Stirner in Philosophy
- Who is: Sloterdijk in Philosophy
- Who is it: Simone de Beauvoir in Philosophy
- Who is: Seneca in Philosophy
- Who is: Sartre in Philosophy
- Who is: Spinoza in Philosophy
- Who is: Socrates in Philosophy
- Who is he: Schopenhauer in Philosophy
- What is it: Sacrificed in Philosophy
- What is it: Sociology in Philosophy
- What is it: Priestlyism in Philosophy
- What is it: Tune in Philosophy
- What is it: Sarcasm in Philosophy
- What is it: Salvation in Philosophy
- What is it: Suspension in Philosophy
- What is it: Solution in Philosophy
- What is it: Semiotics in Philosophy
- What is it: Semantics in Philosophy
- What is it: Simile in Philosophy
- What is it: Secularization in Philosophy
- What is it: Socraticism in Philosophy
- What is it: Sophism in Philosophy
- What is it: Sensualism in Philosophy
- What is it: Separation in Philosophy
- What is it: Overdetermination in Philosophy
- What is it: Deafness in Philosophy
- What is it: Secularism in Philosophy
- What is it: Synergistic in Philosophy
- What is it: Syncretic in Philosophy
- What is it: Saussureanism in Philosophy
- What is it: Subalternity in Philosophy
- What is it: Socio-constructivism in Philosophy
- What is it: Sublime in Philosophy
- What is it: Assumption in Philosophy
- What is it: Socialism in Philosophy
- What is it: Meaning in Philosophy
- What is it: Supreme in Philosophy
- What is it: Subject in Philosophy
- What is it: Sanction in Philosophy
- What is it: Simulacrum in Philosophy
- What is it: Syncretism in Philosophy
- What is it: Significant in Philosophy
- What is it: Synchronic in Philosophy
- What is it: Substance in Philosophy
- What is it: Supernatural in Philosophy
- What is it: Supranatural in Philosophy
- What is it: Subtle in Philosophy
- What is it: Supposed in Philosophy
- What is it: Symbol in Philosophy
- What is it: Sensation in Philosophy
- What is it: Syllable in Philosophy
- What is it: Skepticism in Philosophy
- What is it: Symbolism in Philosophy
- What is it: Meaning in Philosophy
- What is it: Systematization in Philosophy
- What is it: Synthesis in Philosophy
- What is it: Solipsism in Philosophy
- What is it: Subjectivism in Philosophy
- What is it: Voluntary Simplicity in Stoicism
- What is it: Suppression of Desires in Stoicism
- What is it: Sincerity of Purpose in Stoicism
- What is it: Submission to Virtue in Stoicism
- What is it: Voluntary Suffering in Stoicism
- What is it: Ethical Sustainability in Stoicism
- What is it: Sense of Purpose in Stoicism
- What is it: Overcoming Obstacles in Stoicism
- What is it: Reflective Silence in Stoicism
- What is it: Personal Satisfaction in Stoicism
- What is it: Mental Serenity in Stoicism
- What is it: Practical Wisdom in Stoicism
- What is it: Sufficiency in Stoicism
- What is it: Moral Sense in Stoicism
- What is it: Singularity in Stoicism
- What is it: Suppression in Stoicism
- What is it: Common Sense in Stoicism
- What is it: Sensitivity in Stoicism
- What is it: Submission in Stoicism
- What is it: Sustainability in Stoicism
- What is it: Servitude in Stoicism
- What is it: Sincerity in Stoicism
- What is it: Sense of Duty in Stoicism
- What is it: Overcoming Stoicism
- What is it: Suffering in Stoicism
- What is it: Silence in Stoicism
- What is it: Satisfaction in Stoicism
- What is it: Simplicity in Stoicism
- What is it: Serenity in Stoicism
- What is it: Wisdom in Stoicism