Why was it nearly impossible to create a coalition sizable enough to gain themajority in the weimar republic?

Countless historians have sought to understand and explain the failure of the Weimar Republic. The only certainty is that the answer is complex and many factors were involved. Weimar Germany was at the mercy of so many different ideas and forces – political and economic, internal and external, structural and short-term – that it is difficult to isolate one or two as being chiefly responsible for the demise of the republic. To the average observer, Adolf Hitler and Nazism appear the main architects of the downfall of Weimar democracy – but it required a ‘perfect storm’ of economic conditions before Hitler and the Nazis could emerge from the margins of German politics to become a national force. Some historians believe the Weimar Republic was brought undone by post-war conditions; others believe that longer term factors, such as Germany’s inexperience with democratic government, were just as significant. This page summarises some of the main factors that contributed to the failure and fall of the Weimar state. - See more at: http://alphahistory.com/weimarrepublic/why-the-weimar-republic-failed/#sthash.L22XNLyv.dpuf