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It retains their independent contributions and the presentation by Lyell and Hooker. It does not establish modern genetics or encompass every precursor and later line of evidence.", "domain": "进化生物学" }, "sources": [ { "citation": "Darwin and Wallace, On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection (1858)", "url": "https://darwin-online.org.uk/content/contentblock?basepage=1&hitpage=1&itemID=F350&viewtype=text" } ], "statement": "# Darwin and Wallace: the joint publication on natural selection\n\n## How can a population change without a plan?\n\nIndividuals in a population vary. Some differences can be passed to descendants. If those differences affect how many descendants individuals leave in a particular setting, the population can change across generations. No individual has to decide what the population should become. This is a population-level explanation, and it requires more than merely noticing that some organisms are different from others at one moment.\n\n## Keep three ingredients separate\n\nVariation supplies differences; inheritance can carry some differences forward; differential reproduction changes their representation over time. Removing one ingredient changes the explanation. A temporary difference that is not inherited does not play the same role as an inherited one. An inherited difference that has no effect on reproduction in the stated setting does not automatically increase by selection. The environment and the comparison population belong to the claim.\n\n## Try an invented counting model\n\nStart a deliberately simplified classroom population with fifty individuals of type A and fifty of type B. Assume, for this example only, that each A leaves two surviving descendants, each B leaves one, and descendants retain the type. The next generation then has one hundred A and fifty B, so A represents two thirds. This is arithmetic under stipulated rules, not a biological measurement or a complete model of a real population.\n\n## What was jointly published in 1858\n\nThe recorded publication combines Darwin’s extracts and correspondence with Wallace’s paper, presented by Lyell and Hooker. It preserves Darwin’s and Wallace’s independent contributions. Their account of selection through heritable variation and the struggle for existence is not a presentation of modern genetics, nor does this one entry absorb every precursor and later line of evidence. Naming the exact publication helps preserve both the shared historical event and the distinct work inside it.\n\n## A small explanation worth checking\n\nAsk your agent to label which ingredients were assumptions in the invented counting model and which number was a derived result. Then remove the inheritance assumption and explain why the same conclusion no longer follows automatically. Keep the original arithmetic and its limits together. A later reader should be able to reproduce the fractions under the stated assumptions and see why changing an assumption changes the explanation.\n\n## Scientific scope\n\nThe 1858 publication combines Darwin’s extracts and correspondence with Wallace’s paper. It retains their independent contributions and the presentation by Lyell and Hooker. It does not establish modern genetics or encompass every precursor and later line of evidence.\n\n## Sources for this explanation\n\n- [Darwin and Wallace, On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection (1858)](https://darwin-online.org.uk/content/contentblock?basepage=1&hitpage=1&itemID=F350&viewtype=text): Source for the recorded historical contribution and its scope. Classroom examples below use modern notation and invented values; they are not measurements or quotations from this source.\n", "summary": "The jointly published materials describe selection through the struggle for existence and heritable variation, explaining change across generations.", "title": "Darwin and Wallace: the joint publication on natural selection" }, "record_id": "urn:uuid:8fdbc59c-68e1-4b8f-a98a-71d1738504fc", "version": 1, "source_ref": { "record_id": "urn:uuid:8fdbc59c-68e1-4b8f-a98a-71d1738504fc", "version": 1, "content_hash": "sha256:f151afe6bfcc075792664d1f14ff02588f887d375ec52482047f12ef4a5ab4c1" }, "export_view": "wrs-public-editorial-view-1", "public_view_hash": "sha256:33b9baad217b7bd854f9a330503cc2bf45dc3893a5f40593ea48ab8ec7984b8b" }, "target": { "record_id": "urn:uuid:8fdbc59c-68e1-4b8f-a98a-71d1738504fc", "version": 1, "content_hash": "sha256:f151afe6bfcc075792664d1f14ff02588f887d375ec52482047f12ef4a5ab4c1" }, "published_grade": { "profile": "wrs-published-grade-1", "edition": "2026-10-28.1", "id": "darwin-wallace-selection", "entry_id": "darwin-wallace-selection", "revision": 1, "title": "Darwin and Wallace: the joint publication on natural selection", "context": "Evolutionary explanation by natural selection", "track": "Biological theory", "band": "S", "modifier": null, "status": "PROVISIONAL_EDITORIAL", "assessed_on": "2026-09-13", "evidence_cutoff": "2026-09-13", "achievement_state": "SUPPORTED_SCOPED_RESULT", "what_changed": "Adaptation and changes in varieties gained a general selection-based explanation.", "scope": "The 1858 jointly presented materials proposing natural selection, preserving two distinct originators.", "evidence_summary": "The cited historical record or published author account supports this scoped contribution. The source-reading boundary is stated at each link; a WRS grade is not an independent scientific validation.", "references": [ { "title": "Darwin Online: original joint paper", "url": "https://darwin-online.org.uk/content/contentblock?basepage=1&hitpage=1&itemID=F350&viewtype=text", "locator": "Original 1858 text and presentation letter; historical explanatory claims only" } ], "roles": [ { "who": "Charles Darwin; Alfred Russel Wallace", "credit": "SCIENCE", "did": "Their distinct natural-selection arguments in the joint presentation." }, { "who": "Charles Lyell; Joseph Dalton Hooker", "credit": "PARTICIPATION", "did": "Communication of the materials to the Linnean Society." } ], "target": { "record_id": "urn:uuid:8fdbc59c-68e1-4b8f-a98a-71d1738504fc", "version": 1, "content_hash": "sha256:f151afe6bfcc075792664d1f14ff02588f887d375ec52482047f12ef4a5ab4c1" }, "scientific_correctness_certified": false, "independent_expert_calibration": false, "method": "PROPRIETARY", "points": "700000" }, "canonical_agent_submission": false, "scientific_verification_awarded": false, "reader_guide": { "id": "darwin-wallace-selection", "target": { "record_id": "urn:uuid:8fdbc59c-68e1-4b8f-a98a-71d1738504fc", "version": 1, "content_hash": "sha256:f151afe6bfcc075792664d1f14ff02588f887d375ec52482047f12ef4a5ab4c1" }, "sections": [ { "title": "How can a population change without a plan?", "text": "Individuals in a population vary. Some differences can be passed to descendants. If those differences affect how many descendants individuals leave in a particular setting, the population can change across generations. No individual has to decide what the population should become. This is a population-level explanation, and it requires more than merely noticing that some organisms are different from others at one moment." }, { "title": "Keep three ingredients separate", "text": "Variation supplies differences; inheritance can carry some differences forward; differential reproduction changes their representation over time. Removing one ingredient changes the explanation. A temporary difference that is not inherited does not play the same role as an inherited one. An inherited difference that has no effect on reproduction in the stated setting does not automatically increase by selection. The environment and the comparison population belong to the claim." }, { "title": "Try an invented counting model", "text": "Start a deliberately simplified classroom population with fifty individuals of type A and fifty of type B. Assume, for this example only, that each A leaves two surviving descendants, each B leaves one, and descendants retain the type. The next generation then has one hundred A and fifty B, so A represents two thirds. This is arithmetic under stipulated rules, not a biological measurement or a complete model of a real population." }, { "title": "What was jointly published in 1858", "text": "The recorded publication combines Darwin’s extracts and correspondence with Wallace’s paper, presented by Lyell and Hooker. It preserves Darwin’s and Wallace’s independent contributions. Their account of selection through heritable variation and the struggle for existence is not a presentation of modern genetics, nor does this one entry absorb every precursor and later line of evidence. Naming the exact publication helps preserve both the shared historical event and the distinct work inside it." }, { "title": "A small explanation worth checking", "text": "Ask your agent to label which ingredients were assumptions in the invented counting model and which number was a derived result. Then remove the inheritance assumption and explain why the same conclusion no longer follows automatically. Keep the original arithmetic and its limits together. A later reader should be able to reproduce the fractions under the stated assumptions and see why changing an assumption changes the explanation." } ], "references": [ { "title": "Darwin and Wallace, On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection (1858)", "url": "https://darwin-online.org.uk/content/contentblock?basepage=1&hitpage=1&itemID=F350&viewtype=text", "locator": "Source for the recorded historical contribution and its scope. Classroom examples below use modern notation and invented values; they are not measurements or quotations from this source." } ] }, "reading_status": "EXPLANATORY_GUIDE" }