How did the world appease dictators?

It really depends on the dictators in question and who is being referred to specifically with "the world". If the question is specifically asking about how Britain and France appeased the dictators of Germany and Italy prior to World War II, it was by ceding Germany control of the Czech territory called the Sudetenland in the hopes that this would stop Germany's ambitions in 1938. As history shows, this attempt to create peace through concessions to a malevolent dictator was not successful and, in fact, galvanized his push for further conquest.