进化论的基石：从达尔文《物种起源》到现代综合进化论 / The Cornerstone of Evolutionary Theory: From Darwin's On the Origin of Species to the Modern Synthesis

1859年11月24日，伦敦一家书店门口排起了长队，1250册精装本的《物种起源》在当天全部售罄。这本书的作者查尔斯·达尔文在书中提出了一个颠覆当时所有人认知的观点：地球上所有生物都不是神创的，而是从共同的祖先进化而来，驱动这一过程的核心力量是“自然选择（natural selection）”。这个观点不仅改变了生物学，更改变了人类对自身的认知——我们不是上帝的特殊造物，而是和所有生命一样，是数十亿年进化历程的产物。

On November 24, 1859, a long line formed outside a bookstore in London, and all 1,250 copies of the hardcover *On the Origin of Species* sold out on the first day. The author of this book, Charles Darwin, put forward a subversive view that overturned all the cognition of people at that time: all living things on Earth were not created by God, but evolved from common ancestors, and the core force driving this process is "natural selection". This view not only changed biology, but also changed human cognition of ourselves — we are not special creatures created by God, but like all life, the product of billions of years of evolutionary history.

要理解当代进化生物学的前沿进展，必须先厘清进化论从诞生到成熟的完整脉络。本章将从达尔文之前的认知背景切入，系统梳理《物种起源》的核心贡献与历史局限，再讲述20世纪现代综合进化论（Modern Evolutionary Synthesis）的建立过程，最后明确现代进化生物学的基本框架，以及达尔文理论未能解答的核心谜题，为后续前沿领域的学习奠定基础。

To understand the cutting-edge progress of contemporary evolutionary biology, we must first clarify the complete context of the evolution of evolutionary theory from its birth to maturity. This chapter will start from the cognitive background before Darwin, systematically sort out the core contributions and historical limitations of *On the Origin of Species*, then describe the establishment process of the Modern Evolutionary Synthesis in the 20th century, and finally clarify the basic framework of modern evolutionary biology and the core puzzles that Darwin's theory failed to answer, laying a foundation for the subsequent learning of frontier fields.

第一节 达尔文之前的进化思想萌芽

Section 1: The Bud of Evolutionary Thought Before Darwin

在19世纪之前的欧洲，主流认知完全被宗教神学主导：《圣经·创世纪》明确记载，上帝在6天内创造了所有生物，每种生物一旦被创造出来就固定不变，人类作为上帝按自己形象造出的特殊造物，地位远高于其他动物。这种“神创论（creationism）”不仅是被普遍接受的“科学结论”，更是社会道德与统治秩序的基石，任何质疑神创的观点都会被判定为异端，甚至面临生命危险。

Before the 19th century, mainstream cognition in Europe was completely dominated by religious theology: *Genesis* in the Bible clearly records that God created all living things in 6 days, and once each species was created, it remained unchanged. As a special creature created by God in his own image, human beings have a much higher status than other animals. This "creationism" was not only a universally accepted "scientific conclusion", but also the cornerstone of social morality and ruling order. Any view that questioned creation would be judged as heresy, and even faced the risk of life.

18世纪到19世纪初，随着地质学和生物学的发展，神创论的漏洞逐渐显现。法国生物学家布丰（Georges-Louis Leclerc, Comte de Buffon）通过比较不同地区的动物形态，提出物种可能会因为环境不同而发生改变，甚至可能从其他物种进化而来，这一观点在当时引起了巨大争议，迫于教会压力，他不得不公开收回自己的言论。另一位法国学者拉马克（Jean-Baptiste Lamarck）则更系统地提出了早期的进化理论：他在1809年出版的《动物学哲学》（*Philosophie Zoologique*）中明确提出“物种是可变的”，并用“用进废退（use and disuse）”和“获得性遗传（inheritance of acquired characteristics）”解释进化的动力——比如长颈鹿因为经常伸长脖子吃高处的树叶，脖子逐渐变长，这种变长的性状会遗传给后代，经过足够长的时间，就形成了现在的长颈鹿。拉马克的理论首次否定了物种固定不变的观念，是进化思想史上重要的里程碑，但他没有解决遗传机制的问题，也没有证据证明“获得性遗传”确实存在，因此他的理论并没有被当时的主流学界接受。

From the 18th century to the early 19th century, with the development of geology and biology, the loopholes of creationism gradually emerged. French biologist Georges-Louis Leclerc, Comte de Buffon, by comparing the forms of animals in different regions, proposed that species may change due to different environments, and may even evolve from other species. This view caused great controversy at that time. Under the pressure of the church, he had to publicly withdraw his statement. Another French scholar Jean-Baptiste Lamarck put forward a more systematic early evolutionary theory: in *Philosophie Zoologique* published in 1809, he clearly proposed that "species are variable", and explained the motive force of evolution with "use and disuse" and "inheritance of acquired characteristics" — for example, giraffes often stretch their necks to eat high leaves, so their necks gradually become longer. This lengthened trait will be inherited by the next generation, and after a long enough time, the current giraffe is formed. Lamarck's theory was the first to deny the concept of fixed species, and was an important milestone in the history of evolutionary thought. However, he did not solve the problem of genetic mechanism, nor did he have evidence to prove that "inheritance of acquired characteristics" does exist, so his theory was not accepted by the mainstream academic circles at that time.

与此同时，英国的地质学家莱伊尔（Charles Lyell）通过研究地层和化石，提出了“均变论（uniformitarianism）”：地球的地质特征不是由突发的灾难形成的，而是由缓慢、持续的侵蚀、沉积等作用经过漫长的时间积累形成的，这意味着地球的年龄远比《圣经》记载的几千年要古老得多。莱伊尔的《地质学原理》（*Principles of Geology*）给了达尔文很大的启发，让他意识到如果地球有足够长的时间，微小的生物变异完全可以通过积累形成新的物种。1831年，22岁的达尔文以“博物学家”的身份登上了英国皇家海军“小猎犬号（HMS Beagle）”考察船，开始了为期5年的环球航行，这段经历成为他提出进化论的关键契机。

At the same time, British geologist Charles Lyell, by studying strata and fossils, put forward "uniformitarianism": the geological characteristics of the earth are not formed by sudden disasters, but by the accumulation of slow and continuous effects such as erosion and sedimentation over a long period of time, which means that the age of the earth is much older than the thousands of years recorded in the Bible. Lyell's *Principles of Geology* gave Darwin great inspiration, making him realize that if the earth has a long enough time, tiny biological variations can completely accumulate to form new species. In 1831, 22-year-old Darwin boarded the British Royal Navy's HMS Beagle survey ship as a "naturalist" and began a 5-year global voyage, which became the key opportunity for him to put forward the theory of evolution.

> 📌 电子版侧边栏：小猎犬号航行路线图 > 你可以点击[这里](https://www.darwinproject.ac.uk/darwinjournals/calendar/entry-385/)查看达尔文在航行期间记录的详细日记，其中包含了他在加拉帕戈斯群岛观察雀鸟的原始记录。 > > 📌 Digital Sidebar: Voyage Route of HMS Beagle > You can click [here](https://www.darwinproject.ac.uk/darwinjournals/calendar/entry-385/) to view the detailed diaries recorded by Darwin during the voyage, which include his original records of observing finches in the Galapagos Islands.

第二节 《物种起源》的革命性突破

Section 2: The Revolutionary Breakthrough of *On the Origin of Species*

1836年达尔文结束环球航行回到英国后，开始整理自己收集的标本和笔记，尤其是加拉帕戈斯群岛不同岛屿上的雀鸟标本：这些雀鸟的外形非常相似，但喙的形状、大小却因为岛屿上的食物不同而有明显差异——吃种子的雀鸟喙又厚又大，吃昆虫的雀鸟喙又细又尖。达尔文意识到，这些雀鸟很可能都来自同一个祖先物种，因为被海洋隔离在不同的岛屿上，经过长期的变异和自然选择，逐渐形成了不同的物种。这个观察成为他提出自然选择理论的关键证据。

After Darwin returned to England from his global voyage in 1836, he began to sort out the specimens and notes he collected, especially the finch specimens from different islands in the Galapagos Islands: these finches were very similar in appearance, but the shape and size of their beaks were significantly different due to different food on the islands — finches that eat seeds have thick and large beaks, while finches that eat insects have thin and sharp beaks. Darwin realized that these finches probably all came from the same ancestral species. Because they were isolated on different islands by the ocean, after long-term variation and natural selection, they gradually formed different species. This observation became the key evidence for him to put forward the theory of natural selection.

1858年，达尔文收到了年轻博物学家华莱士（Alfred Russel Wallace）寄来的论文，论文里也提出了和达尔文几乎一致的自然选择理论。为了避免被华莱士抢先发表，达尔文在好友的催促下，把自己多年的研究整理成书，于1859年出版了《物种起源》。这本书的全称是《论通过自然选择的物种起源，或生存斗争中有利性状的保存》（*On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life*），最后一版才简化为现在通用的名称[^1]。

In 1858, Darwin received a paper sent by the young naturalist Alfred Russel Wallace, which also put forward the theory of natural selection almost identical to Darwin's. In order to avoid being preempted by Wallace, Darwin, under the urging of his friends, sorted out his years of research into a book, and published *On the Origin of Species* in 1859. The full title of this book is *On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life*, and it was not until the last editi