First, the genetisists of Cabal Enterprises create a new strain of virus
known as the "Brain Bug". This "Brain Bug" is a virus spread through
the air, and is completely resistant to antibiotics. When it comes
in contact with human skin, it seeks out the part of brain that controls
rational thought, and quickly eats it away, leaving the rest of the
brain in tact.
That virus is injected into a special compartment of
Cabal Enterprises pens, then the pens are shipped worldwide. Once most of
world's population begins using the pens, a button is pressed, realising
the gas everywhere. Most of the world turns into mindless zombies.
Then, I will again use my small army of highly armed mercenaries to crush all opposition and
take the throne.