Henry Kuttner 
The Ego Machine 

This is a classic science fiction short story by Henry Kuttner. It tells the story of a talking robot who takes on personalities of historical figures for an experiment. He calls upon the British Prime Minister Benjamin Disraeli and Ivan the Terrible.
This work is part of our Vintage Sci-Fi Classics Series, a series in which we are republishing some of the best stories in the genre by some of its most acclaimed authors, such as Isaac Asimov, Marion Zimmer Bradley, and Robert Sheckley. Each publication is complete with a short introduction to the history of science fiction.