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Related Concept Videos

The Evidence for Evolution02:55

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.The collection of fossils within sedimentary rocks give a record of common ancestry and often depicts the history of evolution.
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.For one, natural selection can only act upon existing genetic variation. Hypothetically, redtusks may enhance elephant survival by deterring ivory-seeking poachers. However, if there are no gene variants—or alleles—for redtusks, natural selection cannot increase the prevalence of...
What is Natural Selection?01:32

What is Natural Selection?

Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.The Theory of Natural...
Evolutionary Processes in Microbes01:26

Evolutionary Processes in Microbes

Microbial evolution occurs rapidly due to short generation times and a variety of genetic processes, including horizontal gene transfer, mutation, recombination, and genetic drift. These mechanisms collectively enable microbes to adapt swiftly to changing environments.Horizontal gene transfer (HGT) allows genes to move between different species and occurs through three main mechanisms: conjugation, transformation, and transduction. Conjugation involves direct cell-to-cell contact for DNA...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
Genetics of Speciation02:16

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.The genetics of speciation involves the different traits or isolating mechanisms preventing gene exchange, leading to reproductive isolation. Reproductive isolation can be due to reproductive barriers that have effects either before or after the formation of a zygote. Pre-zygotic mechanisms prevent fertilization from occurring, and post-zygotic mechanisms...

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Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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Systemic darwinism.

Rasmus Grønfeldt Winther1

  • 1Philosophy Department, University of California, 1156 High Street, Santa Cruz, CA 95064, USA. rgwinther@gmail.com

Proceedings of the National Academy of Sciences of the United States of America
|August 14, 2008
PubMed
Summary

Systemic Darwinism integrates evolutionary theory by focusing on complex biological systems. This approach reconciles historical debates and unifies diverse biological theories for a deeper understanding.

Area of Science:

  • Evolutionary biology
  • Systems biology
  • Philosophy of biology

Background:

  • Darwin's theory of descent with modification established a conceptual framework for biology.
  • 20th-century debates created perceived dichotomies in evolutionary concepts (e.g., law vs. narrative, organismic vs. hierarchical selection, variation vs. essentialism).
  • Contemporary research increasingly focuses on complex biological systems across multiple scales.

Purpose of the Study:

  • To explore the multidimensional conceptual space of Darwin's theory.
  • To re-examine and potentially resolve historical dichotomies in evolutionary thought.
  • To introduce and elaborate on the framework of Systemic Darwinism.

Main Methods:

  • Conceptual analysis of Darwin's theory across three dimensions: explanatory pattern, levels of selection, and degree of difference.

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  • Examination of 21st-century systems-focused research (genomic, cellular, organismic, ecological).
  • Integration of insights from Systems Theory, Systems Biology, and Hierarchy Theory.
  • Main Results:

    • Systemic Darwinism, based on a compositional paradigm, focuses on complex systems and their hierarchical networks.
    • It offers a potential reintegration of the dimensions of Darwin's original conceptual space.
    • This framework can coordinate and integrate various mathematical biological theories (e.g., self-organization, cladistics, evolutionary genetics).

    Conclusions:

    • Systemic Darwinism provides a unified approach to biological ontology by investigating systems.
    • It requires interdisciplinary collaboration and articulation from multiple perspectives.
    • This framework promises to advance bioengineering and deepen the understanding of biological reality.