Why did the us and the soviet end up on opposite sides of the cold war

They had very different political philosophies that lead to a deep mistrust of each other.

Explanation:

The US believes that democracy is the best way to govern, while the Soviets believed in communism.  Both countries thought they were right, and were trying to encourage other governments to follow their lead.  But neither political idea had much in common with the other, so they stood on opposite sides and could not compromise.

the influence of charles louis de secondant , baton montesquieu.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.