There are many factors of crisis in the daily life of the citizens of this world. Thus, the four great eternal problems of humanity (pandemics, war, religious intolerance, hunger), which for a time man believed capable, if not of eradicating, at least of controlling, have come back to challenge international chancelleries, philosophers or the whole of suffering humanity.-The famous pandemics such as the plague or smallpox seemed to have been solved when Covid-19 appeared. Of course, the appearance of new pandemics was not excluded, but the modern world, imbued with its technicality, has always thought that it had the logistical, scientific and medical means to find a quick solution to the lethality of this threat.-With nuclear weapons and the opening of most countries to free trade under the control of the World Trade Organization, conflicts between the great powers seemed highly unlikely, given the destructive consequences of nuclear weapons capable of eradicating life on Earth. Moreover, the economic interdependencies that lead to the respect of the "soft market" favor situations of negotiations for a lasting peace, considering the economic stakes of the partners, who have no interest in becoming belligerents.-Philosophical and religious issues seemed to lead to more secularism and less intolerance. Today, the principles of life that bring people together diverge, between a Western world based on republican principles, but also on an inequitable consumer society, the world of the great contesting powers that are not very sensitive to democratic values and are concerned with establishing a less American-centric world that is more open to their own ideologies (China, Russia, India, Middle Eastern states, for example) and finally the countries of the rest of the world (the Third World in perpetuity) still sucked in by economic scarcity and hunger, continuing imbalances of state power, national and international wars and conflicts, and religious issues.-Religious beliefs and divergent notions of the concept of democracy do not lead to a peaceful world, especially because of proselytizing and the will to power expressed by great powers.