How would you genocide 4 billion humans?
Let's say it's morally correct, an "ands justify the means" type thing where killing 4 billion people will insure the well being of the other 4 billions, the main questions is:
"How will you Kill 4 billion people while being arrested or executed",
"Who are those people, like are you gonna chose specific groups/races/countries to kill or just kill random people equally",
And "how painful will their death be"