[mjp]

leaving a note exhorting people to lead less selfish lives as a way to protect the planet

He is being selfish when he is being true to his deepest feeling an allows his innermost nature to call on him to act in this specific way

[goldstategop]

Suicide is a selfish act.

The irony of it was completely oblivious to a guy who called on others to lead less selfish lives.

What a waste.