The Fragility of Evolution: Part Two

This essay argues for a shift in evolutionary metaphor-away from natural selection and the elimination of the less fit, to a focus on the fragility of biological change. Three biological arenas, in which the organism and environment more obviously interpenetrate, will be examined. The vulnerable and exceptionally plastic neural system of organisms makes possible subtle capacities such as learning and memory. Behavior, as it often precedes morphological change, emerges as an evolutionary axis. Synergisms between organisms lead to novelty on a macroevolutionary scale-multicellularity, coloniality, sociality, and eusociality. Although fragile due to competitive tensions, novel cohesions have repeatedly emerged throughout evolution. Ecology involves the flow of energy between organisms and the biophysical realm, which life has increasingly shaped. Radical spatial heterogeneity and varying levels of temporal disturbances serve to enhance biodiversity, and restrict the dominance of any single species. The atypical event of evolution can occur relatively suddenly and on varied scales. Paradoxically, evolution can be prompted by novel stresses and spaces protected from harsh competitive stress. As life moves to a greater total complexity, fragility increases. In conclusion, this essay discusses the protection of "less fit" human populations.