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Block Fitness.

¹Department of Philosophy, Duke University, 201 West Duke Building, Box 90743, Durham, NC 27708, USA. grant.ramsey@duke.edu

Studies in History and Philosophy of Biological and Biomedical Sciences

|September 19, 2006

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This study introduces Block Fitness, a new concept where an individual's fitness is fixed by genes and environment, ensuring natural selection is explanatory and predictive, not a tautology.

Area of Science:

Evolutionary Biology
Theoretical Biology

Background:

The concept of fitness is central to evolutionary theory, particularly natural selection.
Existing definitions of fitness can lead to tautological explanations, where 'survival of the fittest' simply means the survivors are the fittest.

Purpose of the Study:

To propose a concept of fitness that meets three criteria: non-tautological, explanatory, and predictive.
To introduce and define 'Block Fitness' as a stable, lifetime measure of an individual's fitness.

Main Methods:

Conceptual analysis of the definition of fitness in evolutionary biology.
Introduction of the 'Block Fitness' concept, positing fitness as a fixed value determined by an individual's genetic makeup and environmental conditions.

Main Results:

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Argues that fitness, to be explanatory and predictive, must be a fixed, non-changing property over an individual's lifetime.
Proposes that an individual's genes and environment determine a singular, constant fitness value.

Conclusions:

Block Fitness provides a robust framework for understanding natural selection, avoiding tautological pitfalls.
This stable fitness concept enhances the explanatory and predictive power of evolutionary theory.