Define Biological Success?

The definition of (individual) biological success is having offspring who also reproduce. In other words it's a headcount of grandchildren.

The idea is that "sewing your wild oats" is not sufficient. Your children must also be willing and able to reproduce.

The main objection I've heard to this definition is the case where you have grandchildren who fail to reproduce. Technically this is the "failure" of your children, not you.

Peter Carswell

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Previous answer:

I believe it is if one has offspring that reach the age when they to are able to have viable offspring (whether or not they actually do)

Troy Morlar