H.R.Shovenstuff said:
What if you could go back in time to 1907 when Adolf Hitler was only 18 years of age and stop him from rising to power in Germany? The catch is that you can't come back to 2008, you must stay in the 1907 timeline for the rest of your life... Would you do it?
To be perfectly honest, personally I'm not sure if I would. Not only for fear of disrupting the future but because I simply would not wish to spend the rest of my life in the early 1900's.
Well, let's go with that idea...
So, 1930's Germany, crippled with 1000+% inflation; Britain with NO air/land defences, USA going through the Depression/Prohibition...We lose Rocketry, Surgery, Computers...
Probable Result : Germany descends into Anarchy, all the Jewish businesses are destroyed in the new Krystallnacht. Poland never suffers from the War and so stagnates; France becomes Germany's saviour (closest power) and runs into trouble. The European Nation is formed early under Chamberlain's misrule which leads England into severe debt. Churchill dies an embittered man. USA and England never become allies. The Jewish never migrate, so the Marx Brothers, Superman, Stan Lee, never come to America. The CIA never achieve half of their espionage. Russia's bid for power runs aground by the Steppes as they over-reach their efforts. Hollywood is never formed. Turing dies from homophobia without the help of the Enigma machine to create the Turing Machine. Computers are slowed. Sinclair/Amstrad/Microsoft/Commodore/Atari never happen. Lack of Fertilizers/Surgery reduces the average age, lack of Rocketry prevents America from reaching the Moon. The Insular European Union holds tight to it's power so Hong Kong/India are never returned. The Arabs are helpless as open hostilies break out across Arabia. Kurds suffer genocide. America try to intervene but do not have the European support, so are forced away from Vietnam/The Gulf. The Baby Boom fails to materialise because of the war. Nixon eliminates Kennedy and is never found out. This gives the Mafia the way in and forces America to deal with Colombia via Ground War where Fidel comes to an agreement, allowing hard drugs legally into America. Whilst America prospers, England no longer has Polish or Indian immigrants and suffers from the despondent work force.
Pearl Harbour never happens because Oppenheimer isn't allowed to complete his research with the V2, so Japan invades Australia.
So we have a debauched insular America, Europe that is on the brink of collapse, Africa and Arabia in civil war, Asia/Oceania still running the Cold War against the decadent Americas.
Possible outcomes...Who can say?