Charles Sanders Peirce (1839-1914) wani Ba'amurke masanin falsafa ne, mai hankali, kuma masanin kimiyya wanda ake dauka a matsayin wanda ya kafa pragmatism, tsarin falsafar da ke jaddada sakamako mai amfani na ra'ayoyi da mahimmancin kwarewa wajen tsara imani. An kuma san Peirce don gudummawar da ya bayar ga semiotics, nazarin alamomi da alamomi, da kuma aikinsa a cikin tunani da lissafi, ciki har da ci gaban kibiya na Peirce da alamar Peirce. Ana la'akari da shi a matsayin daya daga cikin masu tunani mafi tasiri na ƙarshen 19th da farkon 20th, kuma ra'ayoyinsa suna ci gaba da yin tasiri ga falsafa, tunani, da ilimin kimiyya a yau.