Anyone born after 1945 has seen this before: the United Nations condemns a dreadful dictator and sends him a mean email and the dictator deletes it (Sadam Hussein was condemned 17 times by the U.N.) - but this was the first time it happened in the Twenties. The League of Nations condemned Mussolini for the Ethiopia invasion, and Mussolini couldn't have cared less.
Mussolini explained why he invaded Ethiopia in this article...
Italy resigned from the League of Nations in 1937 - click here to read about it.