2024-2 Frege and Russell Final Exam #1) Give a sketch of the ideas of the three main eras of Russell’s work and the main differences in the ontological and philosophical positions he held in each. The eras are: Principles Era (1900-1908), Principia Era (1909-1917), and Neutral Monist Era (1917---). It should be noted that in all the eras, Russell held a specific view about what Philosophy (as a ..