Critias’ fame is mainly connected to his illustrious relative Plato (he appears in four of his dialogues: Protogoras, in which he has a minor role, as well as Charmides, Timaeus and Critias). Therefore, when a man at the forefront of twentieth-century philosophy like Karl Popper pays him mind, it is for the sole purpose of investigating Plato’s thought and attitude towards politics (for more on Popper and Critias, see Bultrighini, 1999, pp. 36-37). Outside the narrow circle of classicists, Critias as politician and intellectual in his own right is today no more than a name.
We do not know Critias’ exact date of birth, …
Irmici, Virgilio. "Critias". The Literary Encyclopedia. First published 30 December 2018
[https://www.litencyc.com/php/speople.php?rec=true&UID=14034, accessed 21 March 2019.]