psychic life of micro-organisms : a study in experimental psychology

In 1894, Alfred Binet posed a question so audacious it could have ended his scientific career: do microscopic organisms think? This slender volume represents one of the first systematic attempts to apply experimental psychological methods to single-celled life. Binet argues that if psychology studies the mind, it cannot arbitrarily begin its investigation only at the level of complex animals or humans. The phenomena of life, he contends, are inherent in all protoplasm, from the simplest cellule to the most complicated organism. Through careful observation and experimentation with various microorganisms, Binet probes whether they exhibit behaviors that might qualify as psychic phenomena, memory, or will. The result is neither purely philosophical speculation nor dry laboratory report, but something rarer: a scientist willing to follow his questions into territory where methodology barely exists. Though Binet's specific conclusions have been superseded, the book remains essential for understanding how the boundaries of psychology were once drawn and contested, and for appreciating the radical ambition of a field still defining itself.