Adaptive aging in the context of evolutionary theory.

Area of Science:

• Evolutionary Biology
• Gerontology
• Ecology

Background:

• Traditional evolutionary theory, the Modern Synthesis (neo-Darwinism), primarily focuses on individual selection.
• This paradigm has faced challenges in explaining complex phenomena like aging, the evolution of sex, and biodiversity maintenance.
• Evidence suggests aging has an adaptive origin, conflicting with solely individual-focused evolutionary models.

Purpose of the Study:

• To propose an expanded evolutionary framework beyond neo-Darwinism.
• To re-evaluate the evolutionary origins of aging within a broader context.
• To explain complex adaptations such as aging, sex, and genome architecture through selection for evolvability.

Main Methods:

• Conceptual analysis and theoretical modeling of evolutionary paradigms.
• Critique of the limitations of the Modern Synthesis.
• Development of an expanded fitness concept incorporating ecosystem stability and evolvability.

Main Results:

• Neo-Darwinism is insufficient to explain stable ecosystems, biodiversity, and genome architecture.
• Selection for stable ecosystems provides a tractable modification to evolutionary theory.
• Aging can be understood within this modified framework, alongside other complex adaptations.

Conclusions:

• A revised evolutionary paradigm is necessary to fully understand aging and other sophisticated adaptations.
• Evolving organisms exhibit selection for evolvability, channeling variation for long-term prospects.
• This expanded view of fitness encompasses aging, sex, diversity, interdependence, and genome structure.