1916 – 1997
Robert H. Dicke (1916–1997) was an American physicist at Princeton University whose work in cosmology and gravitational physics included foundational contributions to the study of anthropic reasoning in science. He is credited with an early formulation of the anthropic argument in response to Dirac's large numbers hypothesis, arguing that observed cosmological coincidences are explained by the conditions necessary for observers to exist. His broader research spans radar physics, atomic clocks, and scalar-tensor gravity.
Pioneered early anthropic reasoning: argued in 1961 that Dirac's large-number coincidences are selection effects of observer existence
Co-developed Brans-Dicke scalar-tensor theory of gravitation, a major alternative to general relativity
Led the Princeton group that independently predicted and nearly detected the cosmic microwave background before Penzias and Wilson
Made foundational contributions to atomic physics, precision measurement, and radar technology
Introduced the concept of observer-selection bias into mainstream physics discourse