What are the main contradictions between the largest states of the world at the turn of the XIX-XX centuries?

What are the main contradictions between the largest states of the world at the turn of the XIX-XX centuries? What international alliances were formed in Europe at this time?

As a result of wars for the division and redistribution of already divided territories, a new political map of the world is being formed, new military-political alliances and new contradictions are born. To resolve contradictions, the European powers often resorted to war as an extreme, but completely legal political means. This approach led to numerous wars: conquest, liberation, and for the redistribution of previously divided territories. An order in which all states could restrain each other in order to prevent military conflicts and enslave the weaker by the stronger was not created.

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