Yes, the world’s most respected non-violent political figure of the 20th century did write not one but two letters to the world’s most hated man of his time.
In his letter dated 23rd July 1939, Gandhi urged Hitler not to lead the world to a devastating war using the finest style of English language writing.
“Such are your humiliation of Czechoslovakia, the rape of Poland and the swallowing of Denmark,” he writes. In both the letters he addressed Hitler as “Dear Friend”.
Yet Hitler again did not respond, probably because he never received it.