Paine, Thomas (1737-1809)

Paracelsus, Philippus Theophrastus Bombastus/Hohenheim, Philipp Theophrast von (1493-1541)

Pareto, Vilfredo (1848-1923)

Pareyson, Luigi (1918-1991)

Pascal, Blaise (1623-1662)

Peirce, Charles Sanders (1839-1914)

Petrarca, Francesco (1304-1374)

Petrus Damiani/Pier Damiani/o, S. (1007-1072)

Philo(n) Alexandrinus/Judaeus (13 B.C.-45/50)

Picus Mirandulus, Ioannes/Pico della Mirandola, Giovanni (1463-1494)

Plinius Maior, Gaius Secundus (23/24-79)

Plotinus (204-270)

Plutarchus Chaeronensis (ca. 46-ca. 125)

Poincaré, Jules Henri (1860-1934)

Popper, Karl Raymund (1902-1994)

Proclos/Proclus Atheniensis/Diadochus (410-485)

Ptolomaeus, Claudius (ca. 87-150)