War is a socio-political and ecological event, which is an extreme form of resolving socio-political, economic, ecological, religious, ideological, as well as national, territorial and other conflicts between states, people, nations, classes and social groups through military violence. The causes of war are as diverse as socio-political, socio-economic, and environmental problems that are perpetuated through violence, such as military-mediated violence. The result is a change in any sphere of public life - social, political, economic, ecological, spiritual, both quantitatively and qualitatively. Countries are moving to a fully military state. Modern warfare ensures the achievement of a set of goals not only through military armed violence but also through other means of war, such as scientific-technical, economic-ecological, diplomatic, ideological and then the nature and directions of the new world order. According to the modern view, war is a historical product of the emergence and development of the opposing forces in society. Throughout the history of mankind, war has been a constant companion of human life. There have been fair and unfair wars. Fair wars have often been a stimulus to social change, a new shift in social relations, and a shift in the direction of a historical progress in general. But in the age of modern nuclear war, when nuclear weapons of mass destruction were developed in the arsenal of means of warfare, war has become incompatible with the objective law of community development, with the goals of sustainable development of society, because the war itself and the process of preparation for war have a devastating impact on the sustainability of the environment. Because war causes mass migration of people, unemployment, poverty, socio-economic poverty, environmental degradation. People displaced by the war use unconventional food to save their lives in the form of pets, that destroys the natural environment - flora and fauna. Greenhouse gases emitted as a result of explosions are causing climate change, endangering many species, examples of which abound in war history, bringing the sustainability curve closer to the bottom. The soldiers and the population have to buy large reserves of water and food before the war, they are forced to change their mindset to adapt to new circumstances, focusing not on long-term sustainability but on short-term decisions, all of that causing depression, hopelessness. At this time, a great importance is given to the aspiration of mankind for peace or the salvation of the world; the more perfect the society, the more determined the goal is to move towards sustainability or preservation of the environment and life, which acts as a positive catalyst in their lives. Even an evil person by nature becomes a good rational being as a result of the influence of goodness, although the goodness manifested in actions against war, striving for peace, without this goodness cannot be transformed into harmony, but the main thing is striving for goodness both in the environment and in saving lives. Will there always be a dilemma in the development of humanity, mutual harmony, sustainability or confrontation? I am confident that humanity will show common sense and choose the path to perfection, good action that is sustainable development.