book
active
book:adaptation-in-natural-and-artificial-systemsAdaptation in Natural and Artificial Systems
John Holland's book presenting the theory of genetic algorithms and the mathematical advantage of small, independent genes.
Extracted from this book
Claims (18)
- A true living world will arise only if its processes are morphogenetic.Core thesis that living structure in the world requires processes that repeatedly apply the fifteen transformations.
- Each living center has life to the extent it is linked to other centers; likewise, sequences generating living centers are interdependent.Establishes the necessity of the network of sequences.
- For the first time in modern history, ways of thinking are available that make the criteria for 'living' potentially sharable and actually shared.Asserts that the theoretical foundation laid out in the four books provides a public quality standard for sequences.
- Four features will be fundamental: (1) all processes rethought as morphogenetic; (2) sequences link into a net; (3) continuous evolution becomes widespread; (4) an ethical obligation to heal the land emerges.Vision of the emerging paradigm shift in society.
- Fundamental change, even in high-profile rigid processes like banking, is possible and has been demonstrated in our time.Conclusion drawn from Grameen Bank success that small sequences can change entrenched systems.
- Half a dozen sequences taken together can have a very big effect on the environment and show a wholly new way of conceiving space.Highlights the emergent power of even a small network of interlinked sequences.
- Introducing a small process gene like direct tile-setting management is attractive, brings fun, improves buildings, and increases income.Argument that a tiny snippet is self-rewarding and hence likely to be adopted and spread.
- It is reasonable to expect that sequences, with their inherently far greater power, will have a greater effect than static patterns.Asserts that dynamic, process-oriented sequences will outperform the earlier pattern language approach.
- Our new or revised living processes were too 'large' to be widely copied because they required too much change and were indivisible.Diagnosis of why Alexander's earlier full-process experiments did not spread despite success.
- Practical means must be gradual, incremental modes of change because present system is too massive and deeply embedded for revolutionary replacement.Asserts that only piecemeal injection of morphogenetic sequences can realistically transform the system.
- Processes compatible with current professional norms spread more easily than deeply living transformative ones.Inferred from the co-housing vs. Alexander's own housing process contrast.
- Roughly 2,000 long sequences, each containing ~20 smaller snippets, thus about 40,000 short sequences could completely transform the built environment.Quantitative estimate of the scope of the gene pool needed for a living world.
- Small independent lumps of problem-solving information are more likely to survive and spread into the gene pool.Generalization from Holland's genetics insight to social and architectural sequences.
- The fact that one process calls on other processes is not voluntary; it is essential to the nature of the system, just as in arithmetic.Argues that sequence linkages reflect deep necessity, not option, for the system to work.
- The Internet is a communal memory that makes it possible for good sequences to be exchanged and spread rapidly.Identifies the Internet as the natural location and accelerator for the gene pool of morphogenetic sequences.
- The key thing about all LIVING sequences is that they generate centers in an order which lets each center unfold naturally from the centers laid down before.Defines the essential structural property that a sequence must have to be living.
- To become morphogenetic, a sequence must be reconstituted as steps emphasizing the action of the fifteen structure-preserving transformations.Specifies the design requirement for evolving a simple snippet into a truly life-creating sequence.
- What was difficult or impossible as a larger act of social transformation becomes possible when one uses a genetic approach of small snippets.Summarizes the practical advantage of breaking complex new processes into small, individually adoptable sequences.
Findings (5)
- by 1998, ~10,000 computer scientists used software patterns as common medium of discussionShows how a shared pattern medium can take hold and foster autonomous evolution of ideas among a large community.
- Co-housing process copied all over the United States due to compatibility with professional normsObservation that co-housing spread widely because it required only minor changes to existing professional roles, unlike deeper living processes.
- Grameen Bank assets of $400 million, 10 million borrowers in 52 countriesScale achieved by Grameen Bank seventeen years after starting, demonstrating massive spread of the small sequence.
- Grameen Bank loan failure rate less than 2%Empirical result from Yunus's pilot micro-lending showing extremely low default compared to conventional banks.
- shorter genes less likely to be damaged at meiosis crossoverBiological fact indicating that small independent genes have a survival advantage during genetic crossover.
Hypotheses (3)
- I believe it will also turn out to be the secret of the evolution of the genes controlling the living structure of the Earth.Predicts that the principle of small, independent process genes will drive evolution of the built environment.
- If processes are in use which have these attributes, then we may have the real possibility of a living world.Conditional statement linking the adoption of morphogenetic processes to the emergence of a living world.
- If the snippet works well, it may be adopted and spread to new construction methods, even in the context of different attitudes.Conditional prediction about the self-propagation of small effective sequences.
Neighborhood — ranked by edge-count
Chapters (2)
chapter
- This chapter argues that living processes must spread via small, independent morphogenetic sequences (snippable genes), using piecemeal evolution, a gene pool, and a network of interlinked sequences.
- Working chapter of The Process of Creating Life discussing pattern languages as generic rules for making centers and their role in unfolding living structure from cultural wholeness
Thinkers (1)
thinker
- John HollandauthoredComputer scientist and complexity theorist, pioneer of genetic algorithms and complex adaptive systems.