达尔文是一位著名的英国生物学家，他的理论对生物学乃至整个科学领域产生了深远影响。在中文中，他被广泛认为是进化论的奠基人。达尔文的理论主要集中在物种通过自然选择逐渐演变的概念上。他提出了“物竞天择，适者生存”的观点，强调了环境对生物种群的影响以及个体适应性的重要性。

在英文中，Darwin is renowned as a British biologist whose theories have had profound impacts on biology and the scientific community as a whole. In Chinese, he is widely regarded as the founder of the theory of evolution. Darwin's theories primarily revolve around the concept of species evolving over time through natural selection. He introduced the idea of "survival of the fittest," emphasizing the role of the environment in shaping biological populations and the importance of individual adaptability.

达尔文的著作《物种起源》（On the Origin of Species）于1859年出版，这部作品详细阐述了他的进化论观点。在这本书中，达尔文提出了自然选择作为生物进化的主要机制，并提供了大量的证据支持这一理论。他的工作不仅改变了人们对自然界的看法，也为后来的科学研究奠定了基础。

In his book "On the Origin of Species," published in 1859, Darwin elaborated on his theory of evolution. In this work, he presented natural selection as the primary mechanism for biological evolution and provided extensive evidence to support this theory. His work not only transformed how people viewed nature but also laid the groundwork for subsequent scientific research.