1, in the historical development, contingency plays a certain role, which can accelerate or delay the historical process and give history a unique brand. History is a whole, and as an independent factor, various factors have their own reasons for existence. There is inevitability behind contingency, and they are inextricably linked. Where contingency works, behind it, you can find some inevitability.

2. The positive or negative influence of contingency on history depends on the extent to which it shows inevitability. Chance is only one of many factors in historical development, not unique or decisive.

3. In materialist dialectics, the meaning of contingency is opposite to inevitability, which refers to the uncertain trend that does not occur in the process of the connection and development of objective things, which may or may not appear, and may or may not appear.