Tell him, on the contrary, that he needs, in the interest of his own happiness, to walk in the path of humility and self-control, and he will be indifferent, or even actively resentful.
I believe sustainable use is the greatest propaganda in wildlife conservation at the moment.
What we are only now beginning to fully realize is that in seeking material pleasure too constantly, the capacity for enjoyment or fulfillment decreases and eventually becomes exhausted.