What to do when the man behind one of the largest genocides in the history of the world refuses to stop his murderous campaign?
According to a new book, it seems that lacing his food with female hormones to try and turn him from a monster into a lamb might be an option to consider.
At least that is what British spies considered doing to Hitler during the World War II says the book, plotting to fill German dictator Adolf Hitler's food with female sex hormones during World War II in a bid to curb his aggressive impulses.
The Allies hoped their plan to smuggle doses of oestrogen into his food would make the Nazi dictator less aggressive and more feminine -- perhaps like his sister Paula Wolf, according to the book, Secret Weapons: Technology, Science And The Race To Win World War II.
Professor Brian Ford of Cardiff University, explains in his book that oestrogen was chosen because its tasteless and would have a slow effect, enabling it to pass Hitler's food testers unnoticed.
"There was an allied plan that they would smuggle oestrogen into Hitler's food and change his sex so he would become more feminine and less aggressive.
"Their research had showed the importance of sex hormones - they were beginning to be used in sex therapy in London.
"The plan was to give sex hormones to Hitler and counterbalance his unnecessary aggression," he was quoted in the Daily Mail.
Professor Ford said the plan was perfectly feasible because British spies were in place to lace his food.
He added: "There were agents who would be able to get it into his food - it would have been entirely possible.
"He had testers who used to taste his food. There was no mileage to putting poison in his food because they would immediately fall victim to it.
"Sex hormones were a different matter. They only affected you if you took them for weeks or months on end, so no one would have ever realised that the hormones were in the food," The Telegraph quoted Professor Ford as saying.
The author says the plan was considered as a serious option leading British spies to be deployed and ready to carry out the plot.
"Hitler had testers who used to taste his meals so there was no mileage in putting poison in his food because they would immediately fall victim to it. Sex hormones were a different matter.
"They affected you only if you took them for months on end, so no one would have realized the hormones were in the food," Ford said.