Can we build a science of efficiency? Tadeusz Kotarbiński thought so.
In short: Tadeusz Kotarbiński was a Polish polymath who sought to strip philosophy down to the concrete. By championing reism—the belief that only physical bodies exist—and founding praxeology, the systematic study of efficient action, he transformed how we analyze human work, ethics, and the very nature of reality itself.
Born in 1886, Kotarbiński emerged from the Lwów–Warsaw School as a formidable logician and ethicist. His ontological framework, which he termed reism, posits that the universe is composed exclusively of individual, concrete objects. This pansomatism rejects abstract entities like properties, relations, or sets, arguing that meaningful language must refer only to tangible things. He viewed sentences containing abstract terms as meaningless, distinguishing them from empty names, which he considered reistically valid.
Beyond his metaphysical rigor, Kotarbiński is best remembered for developing praxeology, a discipline dedicated to the science of efficient action. In his seminal 1955 work, A Treatise on Good Work, he provided a foundational analysis of human activity. Rather than focusing solely on labor, he sought to understand the nature of action itself, offering normative classifications to improve how humans organize their efforts. His influence was institutionalized in 1958 when he persuaded the Polish Academy of Sciences to establish a dedicated department for this field.
Kotarbiński was also a committed public intellectual. During the interwar period, he stood against anti-semitism and ultranationalism, famously lecturing while standing in protest against the segregation of Jewish students in Polish universities. After World War II, he served as the first rector of the University of Łódź. His life’s work, spanning from his 1912 doctoral thesis on utilitarianism to his later meditations on a decent life, remains a cornerstone of action theory and analytical philosophy.
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