[kinai]

"Hey lets divert 2 huge natural rivers, I bet there won't be any unforeseen consequences if you really really just put enough thought into it"

[thaumasiotes]

Diverting huge rivers is a project people have engaged in everywhere for multiple thousands of years. We do it because it's useful.

[Aelinsaar]

Killing someone for their possessions and meat has been done for thousands of years, and is useful.