List the reasons for the aggravation of the international situation at the end of the 19th century

List the reasons for the aggravation of the international situation at the end of the 19th century and the beginning of the 20th century.

First of all, it should be said that by this time the old world leaders, represented by Great Britain and France, had been ousted. At that time, the young USA and the German Empire began to take the leading positions. Thus, dissatisfaction arose. In addition, this created the situation in order to begin a new redivision of the world, starting with the colonial possessions. Such, for example, was, in their opinion, deprived of Germany. By this time, the militarization of states was growing, and military-political blocs began to form. All of these were the reasons.