Cousin marriage and rise of the bourgeoisie

"Incest and Influence
The Private Life of Bourgeois England"
Adam Kuper

From publisher:

      "Like many gentlemen of his time, Charles Darwin married his first cousin. In fact, marriages between close relatives were commonplace in nineteenth-century England, and Adam Kuper argues that they played a crucial role in the rise of the bourgeoisie."

see:
http://www.hup.harvard.edu/catalog/KUPANG.html

Some Darwin cousin marriage material available at:

http://books.google.com.au/books?id=aoldc5fJeH8C&dq=incest+influence+kuper&printsec=frontcover&source=bl&ots=X37cttydky&sig=YRKhfmnYUhMZLoF5ncykddAzPUg&hl=en&ei=W-I3S6yuFZHGtAPml_jVAw&sa=X&oi=book_result&ct=result&resnum=4&ved=0CBIQ6AEwAw#v=onepage&q=&f=false

Kipling, Darwin and the law of the jungle

RUDYARD  KIPLING

from The Law of the Jungle:

"Now this is the Law of the Jungle — as old and as true as the sky;
And the Wolf that shall keep it may prosper, but the Wolf that shall break it must die.
As the creeper that girdles the tree-trunk the Law runneth forward and back —
For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack."

If Kipling is correct how does this compare with what Charles Darwin had to say about the wolf as one of this two main examples in "The Origin of Species" of natural selection by mean of competition between members of the same species?

Interesting discussion in wikipedia article – Patrick Matthew and Darwin

"Patrick Matthew (20 October 1790 – 8 June 1874) was a Scottish landowner and fruit farmer. He published the principle of natural selection as a mechanism of evolution over a quarter-century earlier than Charles Darwin and Alfred Russel Wallace. However, Matthew failed to develop or publicise his ideas, and both Darwin and Wallace were unaware of Matthew’s work when they published their ideas in 1858."

see http://en.wikipedia.org/wiki/Patrick_Matthew

The article raises some interesting considerations about the social workings of science.