Who cares about great marks left behind? We have one life... just one. Our life. We have nothing else.
Murderers, in general, are people who are consistent, people who are obsessed with one idea and nothing else.
This free will business is a bit terrifying anyway. It's almost pleasanter to obey, and make the most of it.
I think the family is the place where the most ridiculous and least respectable things in the world go on.