...selection. But I must pass over this preliminary difficulty. The great difficulty lies in the working ants differing widely from both the males and the fertile...individual, and may thus gain the desired end. Thus, a well-flavoured vegetable is cooked, and the individual is destroyed; but the horticulturist sows seeds...

...jaws of the male salmon. We have even slight differences in the horns of different breeds of catde in relation to an artificially imperfect state of...individual, and may thus gain the desired end. Thus, a well-flavoured vegetable is cooked, and the individual is destroyed; but the horticulturist sows seeds...

...bulls and cows of these same breeds. Hence I can see no great difficulty in any character becoming correlated with the sterile condition of certain members...family, as well as to the individual, and may thus "in the desired end. OBJECTIONS TO THEORY 20S Breeders of cattle wish the flesh and fat to be well...

...they cannot propagate their kind." Two paragraphs later Darwin summarizes his solution to the problem: "This difficulty though appearing insuperable, is...individual is destroyed; but the horticulturist sows seed of the same stock, and confidently expects to get nearly the same variety; breeders of cattle...

...castes with dramatically different morphologies from those destined for reproduction, Darwin noted: "The difficulty, though appearing insuperable, is lessened,...applied to the family, as well as to the individual, and thus may gain the desired end" (1859, p. 204). Darwin's interest in cooperative behavior was by no...

...selection. But I must pass over this preliminary difficulty. The great difficulty lies in the working ants differing widely from both the males and the fertile...individual, and may thus gain the desired end. Thus, a well-flavoured vegetable is cooked, and the individual is destroyed; but the horticulturist sows seeds...

...Darwin was well aware of the difficulties of explaining this paradox by natural selection. He proposed that "selection may be applied to the family as well as to the individual" (Origin of Species, end of chapter 8). Later this was expressed as the theory of kin selection, neatly...

...viewed the question as one of the "difficulties" of his theory and proposed to resolve it by the fact that "selection may be applied to the family, as well as to the individual" (1964:237) - that is, essentially, by kin selection. Fisher took the argument a step further by making...

...of the thorax and in being destitute of wings and sometimes eyes, and in instinct. (Darwin 1996:192) This difficulty, though appearing insuperable, is...individual, and may thus gain the desired end.... Thus I believe it has been with social insects: a slight modification of structure, or instinct, correlated...

...selection. But I must pass over this preliminary difficulty. The great difficulty lies in the working ants differing widely from both the males and the fertile...individual, and may thus gain the desired end. Thus, a well-flavoured vegetable is cooked, and the individual is destroyed; but the horticulturist sows seeds...