Hello. You did not inform the article to which this question refers, which makes it impossible for it to be answered accurately. However, I will try to help you in the best possible way.
To support a claim, an article must show evidence that justifies this type of reasoning. In this case, it is important that the article presents real examples of moments of crisis that intensified mutual assistance between individuals. The article can also present statistical and scientific data covered in research that show that this statement is correct and true.