1. Universe Evolution and Development: A Biological Model for Cosmic Culture
The emerging science of evolutionary developmental (“evo devo”) biology (Carroll 2005, Kirschner and Gerhart 2005) can aid us in thinking about our universe as both an evolutionary system, where most processes are unpredictable and creative, and a developmental system, where a special few processes are predictable and constrained to produce far-future-specific emergent order, as seen in the developmental processes guiding the emergent similarities among two genetically identical twins.In discriminating between evolution and development in living systems, one of the most important insights is that the vast majority of biological change that we observe in the emergence or control of complexity is evolutionary. By this we mean it is unpredictable, stochastic, experimenting, creative, locally-driven, a bottom-up, two-way (communication and feedback) process of complexity creation and variation. Only a special subset of biological change, perhaps something less than 5% at the genetic level, to a first approximation, is what we call developmental. By this we mean it is predictable, cyclic, randomness-reducing, convergent, conservative, globally-driven, a top-down, one-way process of complexity conservation and constraint. The “developmental genetic toolkit” is a set of special genes that have been highly conserved in all higher life, from nematodes to humans. To a rough order it involves 2-5% of genes in complex organisms (e.g.,perhaps 2-3% of the Dictyostelium genome of 13,000 genes, Iranfar et al., 2003). These genes constrain and direct developmental change, and change very slowly over time. Evolutionary processes range across the entire remainder (95-98%) of the genome, and produce phenotypic variety. The genes involved in evolutionary processes change much faster over time.
Gould (2002) has argued that the only broadly predictable feature of evolutionary processes is that their variety increases over time. Viewed over geologic time, the “tree of life” gains ever more branches, species, and specializations across all life-permitting environments. At the same time, all biological systems engage in developmental processes, which cause them to be born, grow, mature, replicate, grow old, and die. Such perennial developmental life cycles are the conserved and constraining framework upon which all evolutionary processes occur. If one has the appropriate physical knowledge, such as the ability to computationally model development, or if one has historical experience with prior cycles of a developing system, developmental processes become predictable.
As Smart (2008, 2010), Vidal (2008, 2010a,b), and others in the Evo Devo Universe research community have proposed, evolution and development may work the same way in the universe as a system. If our universe is a system presently engaged in a life cycle (“Big Bang” birth, growth, maturity, replication, senescence, and eventual thermodynamic or other death), we may ask, which of its features are evolutionary, and which are developmental, and which mechanisms it uses to pass on its evolutionary intelligence in the next developmental life cycle. We can observe many physical processes in our universe that seem perennially creative, exploratory, and unpredictable (quantum mechanics, chaos, nonlinear dynamics, non-equilibrium thermodynamics), and a special subset of processes that seem highly conservative, constraining, and predictable (conservation laws, entropy, classical mechanics, stellar lifecycles, spacetime acceleration). Both evolutionary and developmental attractors, or systemic teleologies, appear to operate in this complex system.
If universal change is analogous to the evolutionary development of two genetically identical twins, two parametrically identical universes (possessing identical fundamental physical parameters at the Big Bang) would exhibit unpredictably separate and unique internal evolutionary variation over their lifespan (unpredictable differences in specific types of species, technologies, and knowledge among civilizations), and at the same time, a broad set of predictable and irreversible developmental milestones and shared structure and function between them (broad and deep commonalities in the developmental processes, body plans, and archetypes of life, culture and technology among all intelligent civilizations). This question is thus relevant to astrophysics, astrobiology and astrosociology. One potential developmental process that, if validated, would have great impact on the future of civilizations will now be proposed.