The National Socialist German Workers' Party (NSDAP), more commonly known as the Nazi Party, was a political party in Germany between 1920 and 1945.- Origins in the German Worker's Party.owever, socialism was a popular political philosophy in Germany after the First World War. This was reflected in the growth in the German Social Democrat Party (SDP), the largest political party in Germany. Hitler, therefore redefined socialism by placing the word 'National' before it.