Andrew > "While it's not paleo, your ancestors of 1,000 years ago would
regard you as exceedingly stupid for neglecting a valuable food resource."

What a loaded comment.  True, he would have regarded you as stupid for
neglecting a valuable food resource.  The question, though, is whether
milk falls into that category.

First of all, you assume scarcity.  Your unspoken argument is that we'll
die from starvation or malnutrition if we don't pursue every possible food
item.  We're hardly in that situation in this day and age so your argument
falls apart right there.  He'd not think us stupid for passing up the
products of the Neolithic when there's so much meat, nuts, fruits and
vegetables to choose from, man's natural diet.  And  I argue that we were
hardly in a state of scarcity in paleo times, even without grocery stores
and 7-11s.  Paleo man by and large had plenty from which to choose and was
smart enough to know what foods made him well and what foods made him feel
less than well if not ill.  And in man's natural state, if he had plenty,
I believe he'd generally choose those things to eat which made him well
and bypass those which didn't.

Also, even if milk would have been chosen, you assume it was easy to come
by.  As many have said before, have you ever tried to milk a wild animal?

We're not talking about a rare allergy here.  Maybe Mercola's article is a
good one and we can all stomach casein and lactose without alteration by
the pasteurization process.  Maybe we do have an exception to what Gordon
might call a bedrock paleo principle: Eat only those classes of  foods
which would have been available to ancestors before farming and ranching.