inventor
The invention, surely?
and they don't understand that there has never been a common ancestor of all and only the monkeys
This fact though -- that monkeys are paraphyletic -- argues in favour of (not against) the view that the common ancestor of monkeys and apes was itself monkey-like...
If you think about when the "ape traits" must have evolved, it would be after the new-world monkeys had already diverged away. The common ancestor of monkeys and apes wouldn't have had them, but must have had those traits common to both old and new-world monkeys. It itself has to be basically a monkey.
(I drew out a phylogenetic tree for this but couldn't get it to format, alas...)
That's also interesting... I think the two ways of looking at it are equivalent, i.e. any pattern that satisfies one should also satisfy the other. (Only because the XOR pattern works both vertically and horizontally.)
What book?
won't have the problem of being acyclic
Should that be "cyclic"? I take it from Richard's post that "acyclic" is what we want.
It should be pointed out here that biological genuses, families, orders, and so on do not exist.
Yes, this is true of course.
What I was saying is that humans are the only living member of the Homo family
So was the claim "Humans are the only single species mammal" simply a claim that humans are the only mammal with their own genus? That's certainly not true, see http://en.wikipedia.org/wiki/Category:Monotypic_mammal_genera
The reproductive isolation can be genetic, or it can be simply geographical or habitual.
This is probably not relevant to our point, but Futuyma (2005) Evolution p356 defines reproductive isolation as "reduction or prevention of gene flow between populations by genetically determined differences between them" - i.e. it's not enough that they are geographically separated.
homo sapiens exist in one giant gene pool
This just seems to be a claim that the population size of our species is quite large. There are other species of mammal with large populations. Again, the relevance of any of this to sex-determination is rather doubtful.
None of the things you mention are likely to affect the sex determination system.
the only single species mammal.
The only what?
Hmm. I see. It's a weird sentence, to call a person a "disaster precedent". It would work better with a simple rearrangement:
"Memorable storytelling about past disasters highlights why top thinkers (e.g. the inventor of two environmental nightmares: tetra-ethyl-lead gasoline and Freon) so often don’t see the catastrophes they create."
But I suppose one does not simply edit a quote.