- The first reason for this logic is that causes always have preceding causes and they have their own preceding causes back infinitely and there is no reason to limit a search to recent causes. The further back in the causal chain one goes the more accurate is the claim to have identified the cause of something.
- A second reason for going back in the causal chain is that a (close-to-the-) original cause of something can have relevance in the recent cause for something. For example, if the original cause of life is a gene, a recent cause of life can be a gene. If an original cause of life could not be education, education will not be needed to cause life.
If one did not look at original causes, one could claim that Catholic education, for example, can cause life by discouraging birth control. Instead, the education has a cause in the opinions of church leaders, which has causes in history and culture, which have causes in environments and genetics, and so on and so on. The search for original causes is the search for recent causes.