British mathematician, logician, philosopher, & public intellectual Bertrand Russell was born #OTD in 1872.
One of Russell's most significant achievements is the co-authorship of "Principia Mathematica" (1910-1913) with Alfred North Whitehead. His works, such as "The Problems of Philosophy" (1912) & "Our Knowledge of the External World" (1914), explored issues related to knowledge, perception, & the scientific method.
Books by Bertrand Russell at PG:
https://www.gutenberg.org/ebooks/author/355