Illustrate the law of unity of opposites in Marxist philosophy with examples As long as concrete examples, not too many theories

Illustrate the law of unity of opposites in Marxist philosophy with examples As long as concrete examples, not too many theories

US and China are opposing each other but also depending on each other. Theorist and experimentalist are opposing each other but also depending on each other.

Please give some examples to illustrate the law of negation
Taking nature, human society and human cognition as the objects, three examples should be analyzed in detail: 1. What are positive factors and negative factors; 2. Two negations and three stages

Taking human beings as an example, there are various creatures living in the distant ocean. Their adaptation to the living conditions of the ocean is an affirmation of their existence. With the reduction of the ocean area, fierce competition is a denial of their continued survival. As a result, some of them climb onto the land and become mainland residents. They enter the second stage. The continuous changes of nature come with a long time