The answer is "All Beliefs"
<span>Diderot believed knowledge should be collected and shared among all people because " knowledge is power , it helps to improve oneself ". If it is not collected and shared among people ,people will remain ignorant.Ignorance leads to disaster and it is danger to ordinary people.This answer is correct because it explains the benefits of knowledge and what happens without it</span>
Office of Management and Budget
Assuming you mean the world wars, this is what happened.
World War 1- A figure of royalty, Franz Ferdinand was shot by a member of a terrorist group, Austra-Hungary Declares War on serbia, which both countries brough their allies in it as well. For 4 years, brutal combat took place mostly in Europe and Eastern Europe. The Allies won, Treaty of Versailles was established, which punished Germany. The war was from 1914-1918
World war 2- Adolf Hitler took over a weakened Germany, which Hitler blamed all of Germany's problems on Jewish people. Anti-Semitic laws were passed, then the genocides started to happen after the invasion of Poland. The Nazis took over many countries in Europe, including France. Then in 1941, the Japanese bombed Pearl Harbor, which brought the US in the fight. The war lasted from 1939-1945 and claimed many lives. Germany surrendered, then Japan after the US dropped two atomic bombs on Japan.
This is a very crude description of each war, but I hope this helped. <span />
The last straw that caused that triggered the outbreak of WWI was the assassination of Archduke of Austria - Hungary Ferdinand and his wife on June 28, 1914 by a Serbian nationalist with ties to the secretive military group known as the Black Hand.
Due to this, one month later, Austria - Hungary declared war on Serbia. The situation was joined by other countries based on which alliance they were in. A group of alliances between major powers in Europe had been formed or were in the process of being formed by this time.