The Weimar was against the odds from the beginning. Germany was previously just a group of principalities followed by a short term monarchy. The Weimar was foisted upon the German people by the winners of WWI so it wasn't even a government of their own choosing. Still...it may have been successful had it not be for war reparations and the Great Depression. France in particular was still exacting their pound of flesh which made life difficult, manageable but difficult. But then the Depression more or less doomed the country and made German society ripe for extremism. An extremist, in the form of Hitler, who played on age long bigotries against jews...telling the German people what's wrong and who to blame for their lot in life. Mainly...the former allies holding back German nationalism and the 'jewish problem' which was rotting German society from within.