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Ongoing debates: the origin of life

It is perhaps remarkable that fifty years after Watson and Crick detailed the structure of DNA and Stanley Miller performed the first bold experiments aimed at producing self-replication biochemistry, there is little consensus on how life started. This is sometimes referred to as the problem of ‘abiogenesis.’ Darwin’s advocates often present natural selection as a complete and satisfying account of biology. Dawkins goes so far as to say it “solves the mystery of our existence.”Dawkins, The Blind Watchmaker 5.If we consider its potential application beyond biology to social contexts through sociobiology it could theoretically explain a great deal more than our existence. However, the power of natural selection only comes into the picture once we have the twin components of replication and inheritance with variation. But do these twin features arise inevitably? If not, their origin will need be to be explained.

There is still optimism that the problem will be solved, but at the moment it is hard to predict how much will be attributed to chance. As with natural selection, until we have some confidence as to the probabilities involved it is possible to draw a wide range of conclusions. On the other hand, Manfred Eigen considered our knowledge to be sufficiently detailed to declare life “inevitable.”Qtd. in Holmes Rolston, Genes, Genesis and God: Values and Their Origins in Natural and Human History (Cambridge: Cambridge University Press, 1999) 424.Biochemist George Wald shares this view, also concluding that “the universe breeds life inevitably.”Qtd. in Holmes Rolston, Genes, Genesis and God: Values and Their Origins in Natural and Human History (Cambridge: Cambridge University Press, 1999) 424.

In recent years, Miller’s experiments have been refined and greatly enhanced, but as Ruse puts it: “at the moment the hand of human design and intention hangs over everything...”Ruse, Can a Darwinian Be a Christian? The Relationship between Science and Religion 64. Stanley Miller himself has become cautious: “the problem of the origin of life,” he says, “has turned out to be much more difficult than I, and other people, envisioned.”Qtd. in Conway Morris, Life's Solution: Inevitable Humans in a Lonely Universe 48.The difficulties have led no less an authority than James Watson to the conclusion that it the origins of life should be considered “almost a miracle.”See Conway Morris, Life's Solution: Inevitable Humans in a Lonely Universe 46-50, 67.

Despite the challenges, abiogenesis research has made laudable progress on several fronts. Two facts have emerged: there are plausible scenarios for how several amino acids were produced,Although the most promising scenarios require quite different chemical environments lessening the chances that the amino acids would be found together. See Conway Morris, Life's Solution: Inevitable Humans... and there is evidence that complex life developed early on. For example there is evidence that carbon from 3.8 billion years ago passed through photosynthesis indicating the presence of complex plant-like organisms.Conway Morris, Life's Solution: Inevitable Humans in a Lonely Universe 108. This means that life must have arisen on Earth almost soon as the Earth could physically support it.Conway Morris, Life's Solution: Inevitable Humans in a Lonely Universe 108. This fact suggests three possibilities: self-replicating molecules are likely to form, life on Earth is due to incredible luck, or life originated somewhere else (where the improbabilities are lessened through different physical circumstances or the availability of time). Francis Crick and Fred Hoyle advocated this third theory which they referred to as ‘Panspermia.’

The lack of a detailed account of the origin of life means that it is too early to say that evolution provides an answer to the mystery of our existence.

 Printer-friendly | Feedback | Contributed by: Adrian Wyard

Go to Evolution Topic Index

Ongoing debates: the origin of life

[1] Does Evolution ‘do the work of a friend’ for the Christian Religion?
Setting the scene - why focus on providence?
[2] Supposed challenges from the evolutionary sciences to theology
Intellectually fulfilled atheists?
A challenge to human uniqueness and status?
A challenge to purpose in creation?
A threat to the veracity of scripture?
Evolution ‘explains away’ theology?
A challenge to Christian morality?
The challenges in wider context - Darwin as a scapegoat?
[3] The current state of the evolutionary sciences
Different ways of conceptualising Darwinian evolution
Evolution as chance and necessity
Evolution as an algorithm
Evolution as movement within a ‘fitness landscape’
Ongoing debates: contingency versus convergence
Ongoing debates: what are the key causal factors in biological history?
Ongoing debates: the environment as the principle cause?
Ongoing debates: convergence as the principle cause?
Ongoing debates: ‘Universal biology’ as the principle cause?
The importance of moving from evolution as abstraction to particular history
Ongoing debates: directionality and progress
Different levels and kinds of selection?
[4] Responses from theology
Evolution, probabilities and providence
Responses from contemporary theologians
Holmes Rolston III
Keith Ward
John Haught
Arthur Peacocke
An increased role for general providence?
Theology of Creation in the light of evolution: three scenarios
[5] Concluding remarks
Sources

Source:

Adrian Wyard
Adrian M Wyard MSt

See also:

Evolution
The Relation of Science & Religion
Purpose and Design
Genetics
The Argument From Design
The Anthropic Principle
Opinions
Charles Darwin
DNA Double-Helix