In "The Most Dangerous Game," how does General Zaroff justify his hunting of human beings?

General Zaroff lives for hunting as he mentions to
Rainsford when they first meet. He travelled the world looking for an animal that could
match his wits, speed or strength. Zaroff lost all the joy he felt in life when he could
not locate an animal to match his hunting skills.

Zaroff
notes "I had no wish to go to pieces," so he would import the largest and most dangerous
game possible - humans. Plus, the humans are given the opportunity for a headstart, plus
a pistol. If the humans outsmart him for three days, they are returned to civilization.
Zaroff assures himself that he is being fair to the "animal" by giving the soon to be
victim these allowances.