According to Guns, Germs, and Steel, why were "founder crops" important in the Fertile Crescent?

Founder
crops are crops that become the basis of agriculture in a given region.  They are the first
crops to be domesticated.  This allows agriculture to begin and, eventually, to diversify to
where crops other than the founder crops are domesticated.

Founder crops were
important in the Fertile Crescent because they allowed that region to get agriculture before any
other region of the world.  Because the Fertile Crescent got agriculture first, it also
developed civilization first.  This allowed Eurasian civilizations to become more powerful than
those of any other region of the world.

The founder crops in the Fertile
Crescent were particularly plentiful and particularly well-adapted to human use.  On p. 139 in
the paperback edition of the book, Diamond tells us that the majority of wild grasses with the
largest seeds were native to the Fertile Crescent or nearby regions.  What this meant is that
people who lived in that area had a large number of plant species to pick from when they started
to move towards farming.

Thus, the founder crops of the Fertile Crescent were
important because they were plentiful and useful to humans, thus giving people in that region a
head start towards civilization.