Well really, I only adopted the time travel aspect as a device to put Hitler in to the present day to examine how Hitler and classical Hitlerian Nazism would relate to the modern World and sending Nazis back in time from say 1944/45 had no utility to me in that regard. On the wider issue of the science fiction story, of people who go back in time to change some aspect of history to create a more favorable present, that is a very interesting scenario. Let us say, a scientist has recently invented a time machine that allows travel in to the past, so he buys today’s newspaper with all yesterday’s horse racing results on it, he goes back in time to yesterday and hands today’s newspaper to himself. Then he time travels back to today. As his yesterday self now has the newspaper from today, his yesterday self can win a lot of money by placing bets on the horses. Now he has changed the course of events in that knowing nothing about horses he would never have been able win that money but perhaps he has not actually changed history ( previous events ), if when he got in the time travel machine to go back to yesterday he already remembers have met himself yesterday and being handed the newspaper. So the scientist does a test to see if it is possible to change history, so he stays at home on a Thursday and nobody calls to his house, one week later he buys the newspaper and plans to call to his own house one week ago on the same Thursday and hand his one week earlier self a week later newspaper. He knows nobody called to his house that day one week ago, so what is going to happen, well he gets in the timemachine goes back one week and when he leaving his offices where his timemachine is, he gets beaten up by a mugger and ends up in hospital and so he decides being injured after leaving hospital he will not visit his one week ago self but go back to his own time in the time machine. My point being is that if the past is fixed by the stage it has come to be the past ie monolinear and changeable, even if one has a time machine, that one can use to travel back in to the past, one can only do what one has done in the past ie nothing new. So if the past is fixed, if Hitler in 1942 had tried to have FDR assassinated in 1930 through having access to a time machine that allowed travel back to the past, he might send a commando team back to 1930 and they might have attempted to kill FDR but if the past is fixed they will not succeed since FDR is still around in 1942. If time is potentially multilinear on the other hand, they will have a possibility to kill FDR, thought if time is not monolinear things get hugely complicated, in that they are traveling from a 1942 in which FDR is President of the USA but if they have just killed him he can’t be President of the USA in 1942, does time split off in different directions one in which FDR is assassinated in 1930 and another in which he isn’t and he goes on to President of the USA 1942? If there are now two different paths for time, one of which is FDR is assassinated in 1930 and one in which he isn’t, if they use the time machine to travel back to 1942 do they stay in the path in which FDR is assassinated and do they risk the possibility that things have developed differently in Germany because FDR has been assassinated but not to their liking e.g. Hitler killed in a car crash 1931, no Nazi Germany. As for Hitler 1942, if time can split in to different paths, if he has successfully had FDR assassinated in 1930 but that caused time to split in two different paths, even if the path he has created would be a great advantage for him e.g. FDR assassinated, Hitler does not die in a car crash in 1931, Hitler flies in to Washington to accept the uncondtional surrender of the American Government 1946, this of no advantage to our 1942 Hitler if he is not in this path. If on the other hand time can not diverge in to different paths but it is possible to change past events, that would open up the paradox of a man traveling back in time to kill his step father because he hates him but unknown to him his step father is actually his biological father in which case if he succeeded in killing his biological father several years before he himself was born, how does he get born to go on to kill his father?
Best and Warm Regards
Adrian Wainer