Examples could be Hitler, Stalin or Mao- this question is relevant to the three dictators.
For Hitler, look at the impact of:Treaty of VersaillesStab in the back theoryPolitical instability in Germany (attempted coups)HyperinflationHitlers arrest and Mein KampfGreat Depression 1929Election slide and the Reichstag fireEnabling Act 1933Night of Long Knives
Discussion on how these events/methods created the conditions which helped Hitler rise to power
Remember to contrast with examples of what did not help, e.g. the Golden Age (Locarno, Dawes) and how this limited the growth of Nazism