Martin Cragg-Barber said:
Another question arising from this is whether the total amount of
chemical diversity has increased with this spread of 'totalitarian
agriculture'.

Aikicrow says:
I have very little use for the idea of chemical diversity, unless you
are reffering to the humus molecule; which is the foundation of
terrestrial life. If we had known about humus after WW2, the suicidal
repercussions of dumping our left over munitions chemicals on our farm
lands could have been easily foreseen.

Martin Cragg-Barber said:
If there is more diversity then at some point won't mutating bacteria
evolve to fill the gap and make use of the man-made chemicals?

Aikicrow says:
No.
Totalitarian agriculture began in mesopotamia ten thousand years ago.
At the time of the "agricultural revolution" the fertile crecent was a
lush green paradise, packed with biodiversity. After less than two
thousand years of totalitarian agriculture; the soil structure and
biology (which took millions of years to build) had been competely
destroyed. The practice of totalitarian agriculture spread across the
world like a horrific wild fire. This fire spread because the practice
of totalitarian agriculture, both increases population and reduces the
land's carrying capacity at the same time. Most of the deserts of the
world are the destructive footprints of agricultural empires. The use
of modern chemical fertilizers is literally like dumping rocket fuel on
this world-consuming fire! We now send our chemically produced
surpluses to increase populations that already far exceeds their land's
carrying capacity.

Totalitarian agriculture has as it's ultimate (but mostly unspoken)
goal: To turn the entire planet's biosphere into humans and human food.
This operating philosophy is a perfect recipe for rapid mass
extinction.