Look at international issues from a global perspective, history is always surprisingly similar, when the snow-capped mountains before the collapse, not a snowflake is innocent! No one wants to hear bad news, so people tend to underestimate the probability of bad things happening. 
To analyze the possibility of the outbreak of a new war, a war and then the old World War II analysis is essential, I believe that the root causes of World War I and World War II are: Emerging imperialism and the old imperialist countries on global resources, economic possession imbalance intensifies; the outbreak of World War I with inevitability, but the outbreak of World War II with a chance;
World War I and World War II were the root causes: colonial imperialism crazy child wins, continue to compete for world hegemony policy. 
Reason behind the First World War broke out: Britain and France and other capitalist development to mature, to dominate the world situation has formed a pattern. And Germany came from behind to dominate the British and French demands to break the pattern. So Britain and France and Germany of conflicts, contradictions become a pre-war countries in the principal contradiction. It is the contradiction between their development was a result of the unprecedented scale war.
Concentrated expression: Germany and France contradictions, contradictions, Germany and Britain, German and Japan, Germany and Russia contradiction, Austria and Russia contradiction.
(1) "Anglo-German contradictions", the Anglo-German contradictions in the re-division of the world's problems is the main contradiction in the early 20th century capitalist countries, which is one of the main reasons leading to the outbreak of the First World War. Since the 1770s show the evolution of Anglo-German relations, the Anglo-German conflict for the first world war role, though not the only important but can not be underestimated. Navy competition and the formation and development of the Allies are two main forms of the Anglo-German conflict, the two are interrelated and influence each other, and finally become a major factor leading to the outbreak of the First World War.
(2) "Franco-German conflicts," study from the actual situation, "said the major Anglo-German contradictions" are not comprehensive. Britain to Germany as a major rival, and Germany did not respect the policy of the United Kingdom as the main enemy, but in the specific competition policy and the British Navy as a major rival, therefore, the contradiction between the two countries constitute the principal contradiction. Germany is the biggest enemy of France, in terms of the development of European hegemony or the German point of view is true.
(3) "Russo-German contradictions", "Main said the Anglo-German contradictions" is entirely inconsistent with historical facts. A pre-war between Britain and Germany on the colonial question and no irreconcilable contradictions, there is no serious conflict, Russia and Germany than Britain and Germany contradiction contradiction, outstanding. If a war is due to competition for colonies and spheres of influence caused by the fight, then clearly Russia and Germany contradiction is more direct cause. 
On the basis of these contradictions, the imperialist countries to step up military preparations, have increased the military budget, to expand the army to develop operational plans, step by step onto the path of war. Meanwhile, the propaganda machine of the imperialist countries also cooperate incite chauvinism, such as: Queen bourgeois scholars tried to preach war can solve the problem of overpopulation, save industrial and commercial crisis reactionary fallacy.
Reason behind the outbreak of World War II:
1, people in Germany a strong resistance and resentment, at the initiation of national revanchism "Treaty of Versailles" system. 
2,1929-- 1933, the world empire have suffered severe economic crisis. To overcome the crisis, they played each other tariffs, trade war, so that the contradiction is increasingly intensified.
3, Mussolini concluded that territorial expansion is to reduce domestic economic crisis in a good way, and ordered attack Ethiopia in October 3, 1935, due to the strength difference between the two countries, together with the Western powers stand idly pull side frame, then only seven months income bag. The war of aggression, in order to account for the impact of the economic crisis disadvantage of Germany, Italy, Japan and pointed out the direction, saw the dawn of solving domestic economic crisis. 
The reason for the outbreak of war and the complex background, but after the main line can sort out a concise summary of the logic:
1, the new forces of the old forces of impact in case of irreconcilable outbreak of war.
2. Economic development crisis, the outbreak of the war when the difficulties and bottlenecks too serious.
So deliberation and preparation of war about how long? From World War I and World War II, there are clear signs to be found on the time point of view: Probably in about six years.
We had a saying: "Misfortune blessing of the Forest, Fu Xi disaster of the V"! 
From the end of World War II has been a full 75 years later, World War I and World War II, but 20 years apart in time, what is the reason Third World War delayed for so long? Some people will certainly say that because nuclear deterrence, forcing the major powers did not dare to launch the Iraq war ends. Note: This statement is very Zhan Li. But dare not does not mean that war is focused on a variety of factors due to reach the critical point, so the war came, nuclear deterrence can only be set aside.
Next we have to analyze why the current pay close attention to the possibility of a third outbreak of war, to guard against the outbreak of a third world war brought their impact. I analyzed from the following four areas: competition, economic crisis, nationalist aspirations of economic competition, or the colonial system of alliances. 
Economic competition: China as a typical representative of the rise of emerging economies, with the old capitalist countries (for example: United States) to compete for trade between the more and more serious, "Sino-US trade war" has become a hot word household, related events the list goes on. 
Competition for colonies: Modern colonies and the old colonial concept is already different from the old colonies with the press and the rule of nature, modern colonies are more inclined to bind and exchange of resources and economic, popular terms it is "to help pull knot faction ", a pre-war and slavery, colonial rule, brutal abuse of resources colonial era has won a big difference. This aspect of the emerging countries (for example: China) and the old capitalist countries (for example: US) has intensified competition between. Breaking the dollar monopoly, promote internationalization of the RMB, and so on all the way along the old country is bound to dominate the world system to form old fierce collision. 
Economic crisis: World War II, although from time to time occur once the economic crisis, but varying degrees of severity, not excluding the impact of lighter statistics, the 1957 to 1958 economic crisis caused by the collapse of the Bretton Woods system in 1973 to 1975 caused oil prices led to overproduction the economic crisis, from 1990 to 1991, Keynesian liberal economy led to economic stagnation and inflation at double the economic crisis predicament caused by 2000 to 2008 stock, debt agency false prosperity of the economic crisis caused by either the United States to recover from the recent economic crisis over the past 14 years, or analysis of the worst in history of world time laws of economic crisis of view, 2020 is the outbreak of the economic crisis, the most likely year 1929: the great Depression, 1975: the United States broke out of the worst economic crisis in 2020 years, just the third in 45 years. In this way it is, even if there is no epidemic, the United States is also likely to have or to the edge of economic crisis, not to mention a worldwide outbreak this year of a large outbreak.
Nationalist aspirations: the voice of the Taiwan issue is the unification long-standing problem, the problem is not solved, it will be the day hanging on the Chinese people a sword, history has been proved that the remaining issues will be a critical moment It may evolve to decide the fate of life and death issue. For example, the history of the northern nomads south of the Central Plains and the Central Plains collusion or threatening regime change in fortunes even more than the incident many times, people should learn from history, vigilant. Recently the United States provoked the bill Taipei, Tsai Ing-wen military exercises and so on events visible clues. 
To sum up four levels to do an objective analysis, the conclusion there is sufficient reason to cause people need to pay attention to the fuse of war, we should pay attention to some of the actions of the countries before the war, and then prepare for war and to think somewhat. The current world is not peaceful, a marked increase in recent years, local conflicts, economic cure, cure classes, the concentration of wealth as a result of social discontent more and more serious, then the possibility of a major reshuffle of the world's wealth will be increasing. 
The nature of the capitalist invasion and the use of child abuse invasion metastasis domestic crisis, the sweetness of wealth creation myth of previous experience, there is no reason not to believe that this time they will not come to resolve the internal crisis through war, abuse seize his country's resources possible.
Modern warfare is playing with high, high speed, high information, full, three-dimensional combination of style war, but also need practical experience of this war. So more realistic scenario exercises, preparing and practicing hand is necessary; Gulf War sounded the horn known as a distinct fourth military power in the instant collapse of Saddam Hussein. 
43 BC, Cicero [] defending the republic, men were eventually brutally murdered political opponents Antonio, talented side demonstrate in front of the great thinkers of tyranny dictatorship weakness. - Chinese people do not take the initiative to provoke, provoke a war of aggression, but we must always be ready to face "the tyranny of dictatorship" to give the "all-powerful."