The phrase "contingent nature" is correct and usable in written English.
You can use it to refer to something that is dependent on or conditioned by something else. For example, "The contingent nature of the project means that it will only proceed if certain conditions are met."
Yet cases of repeated evolution seem to refute it by presenting clear evidence that natural selection can override the contingent nature of evolution.
Pop acts become classic when they reveal the contingent nature of "classic".
The radically contingent nature of the figures is another reason for not taking them too seriously.
That led Mr Gould to muse on the contingent nature of life.
The contingent nature of the assets would have a lot less significance in the United States.
And that starts with an ignorance about the fragility and the contingent nature of our own systems.
These differing results by cause and gender are consistent with the context-, time-, and cause-contingent nature of social gradients; empirical findings indicate that income-mortality associations are not fixed, but rather vary across cultures and centuries [ 36].
For Pavlov, the emphasis fell on the contingent, provisional nature of the association — which enlisted other reflexes he believed to be natural and unvarying.
It acknowledges the arbitrary, contingent, inexplicable nature of human behavior in the way its stories circle and lurch and stop midstream, and in the way it crowds the frame with unnamed cops and masses of angry or bored or hyped-up bystanders.
And like Conrad before him, together with this sense of the contingent, provisional nature of life, there is always the shadowy awareness that the human species is an animal with an immensely violent history, one that over a couple of million years of guile and brute force has struggled its way to a position of planetary dominance.
Interestingly, the MDTP, as a 'transfrontier' project, has renewed the attention to the border issue, and even further reinforced its contingent historical nature.
