On the Origin of Species to be expanded with his research results and published if he died prematurely. In November 1844, the anonymously published popular science book "Vestiges of the Natural History of Creation", written by Scottish journalist Robert Chambers, widened public interest in the concept of transmutation of species. "Vestiges" used evidence from the fossil record and embryology to support the claim that living things had progressed from the simple to the more complex over time. But it proposed a linear progression rather than the branching common descent theory behind Darwin's work in progress, and it ignored adaptation. Darwin read it soon after publication,
On the Origin of Species sentence [Light will be thrown on the origin of man and his history] I show that I believe man is in same predicament with other animals. Many modern writers have seen this sentence as Darwin’s only reference to humans in the book; Janet Browne describes it as his only discussion there of human origins, while noting that the book makes other references to humanity. Some other statements in the book are quietly effective at pointing out the implication that humans are simply another species, evolving through the same processes and principles affecting other organisms. For example, in Chapter III: "Struggle