one without the other, so this paper and a chapter from Darwin's unpublished manuscript of the "Origin of Species" were read before the Linnaean Society on the same evening and published in their Proceedings for 1858, and thus appeared in the same year, 1859, as Marx's Critique of Political Economy. This theory of Natural Selection is, you know, in brief, that more animals of every kind are born than can possibly survive, than can possibly get a living. This gives rise to a Battle for Life. In this battle those are the victors who are the best able to secure food for themselves and their offspring and are best able by fight or flight to protect themselves from their enemies. This is called the Law of the Survival of the Fittest, but remember, the Fittest are not always the best or most highly developed forms, but simply those forms best suited to the then existing environment. These two extremely interesting papers of Wallace are printed as the two first chapters of his book "Natural Selection and Tropical Nature," published by MacMillan, a book so fascinating I would beg all my hearers and readers who have not read it to do so.
This law of double or multiple discovery holds good of all great discoveries and inventions, and
