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“The Origin of Species” by Charles Darwin

The Origin of Species, written by Charles Darwin in 1859, is one of the most influential works in the history of science. This book redefined how the world view evolution, and sparked a revolution in the scientific community.

Even today, it is often referred to as the most important book on evolutionary theory. The Origin of Species describes Darwin’s journey as he researches and formulates his theory of natural selection.


The Origin of Species is split into two sections. The first part of the book contains an overview of Darwin’s research and key ideas, while the second part centers around providing examples and evidence to further explain his arguments.

The book is divided into fourteen chapters, covering topics such as natural selection, common descent, morphological similarities and differences between species, and the struggle for existence.

Natural Selection

The cornerstone of Darwin’s research was his theory of natural selection. He based this theory on the observation of selective breeding practices in domesticated animals, and applied the same principles to nature.

Natural selection is the process that leads to the differential survival and reproduction of members of a species based on their traits. This is how species divergence and specialization occurs over time, eventually leading to the origin of new species.


The Origin of Species discusses Darwin’s theory of common descent, which states that all living species are descended from a common ancestor, or single origin.

Darwin argues that all life on Earth is related, and has descended from one original species, which has evolved over time. This is known as macroevolution, the process by which large-scale changes in species occur.


The Origin of Species contains a wealth of evidence to support Darwin’s theories. He provides examples from a range of fields, including biology, geology, and paleontology.

He also examines the morphological evidence between related species, drawing on his observations from his trip around the world on the HMS Beagle.


The Origin of Species is a landmark in evolutionary thinking and continues to be a cornerstone of biology. It provides an in-depth examination of Darwin’s theories and the evidence to support them.

It is a must-read for anyone interested in evolutionary theory and it’s historical importance.

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