Eighty years after World War II, polls showed that many Americans and Western Europeans believed that within a decade the third global conflict was more devastating, and tensions with Russia were seen as the most likely cause.
As Europe prepares to mark the 80th anniversary of VE Day, YouGov's poll also shows that most people believe that events during and before World War II are relevant and must continue to be taught to the younger generation.
Among the five European countries, 41% to 55% of respondents were surveyed: Britain, France, Germany, Italy and Spain, who think they think another world war is likely within the next five to ten years, and this view is that 45% of Americans.
Of the 68% to 76%, most said they expected any new conflict to involve nuclear weapons, while 57% to 73% said World War III would result in greater loss of life than in 1939-1945. Many (25% to 44%) think it will kill most people in the world.
Most people in Britain range from 66% to 89% in Britain and they want their country to participate in the war - but only minorities, ranging from 16% in Italy to 44% in France, believe their armed forces can defend them.
By comparison, 71% of Americans say they have confidence in the U.S. military. Russia is considered the most likely cause of another world war, with 72% to 82% of Western Europeans and 69% of Americans, followed by Islamic terrorism.
However, many Europeans feel the same about the so-called allies in Europe, with tensions with the United States viewing tensions with the United States as a major threat to continental peace.
Looking back on World War II, respondents in France (72%), Germany (70%) and the United Kingdom (66%) were most likely to say they knew a lot or quite a bit of conflict with people in Spain, which is not involved - at least (40%).
About 77% of French people say they are taught a lot or a considerable number in school, while 60% of Germans, 48% of British and only 34% of Spanish. The younger generation is more likely to have been taught a lot.
However, the vast majority of Western Europeans and Americans (82% to 90%) said they believed that World War II was important, teaching World War II in schools, and 72% to 87% said that the events of conflict and the events that occurred still make sense today.
Between 31% (Spain) and 52% (US) in all six countries, they say they think “crimes like those committed by the Nazi regimes in the 1930s and 1940s may have happened in their own country for the rest of their lives.
A growing number of respondents (44% to 59%) said they believed Nazi-style crimes could have been committed in "another Western European country", with 44% to 60% of them also saying this could happen in the United States, including 52% of Americans.
Asked who made the best efforts to defeat the Nazis, 40% to 52% of the five countries surveyed responded to the United States and 17% to 28% of the Soviet Union. However, in the UK, 41% of respondents responded to the UK - this view is only 5% to 11% of Americans and other Western Europeans.
Almost half of the Germans (46%) said they believe their country has done a good job since 1945 in handling wartime operations, a view that 49% of Americans and 58% of British people agreed. Respondents in France (34%) and Italy (30%) were not very sure.
But nearly half of Germans (47%) said they also thought their country was “too aware of the Nazi past”, preventing the country from being strong enough on recent issues. Only 24% believe their leaders have reached the right balance.
The biggest practice since the end of the war was to keep peace the most, with the majority (52% to 66%) in all six countries responding to NATO, and at least a majority (44% to 60%) crediting the United Nations for contributing “large amounts” or “substantial amounts) of the money.
45% to 56% of Western Europeans also believe that part of the EU is a goal of maintaining peace in Europe - an important contribution to the lack of conflict.