The Brotherhood of the Red Coast were a feared band of smugglers and shipwreckers, and if one of the sailors they'd stranded turned out to be a pirate with a price on his head, they'd dabble in bounty collection as well.

"It's the job of the captain to pick the crew, and the duty of the first mate to test them for worthiness. How Zoro came to accept each of the straw hats as nakama."

It should be easy to judge a man by the shape of his soul, but Strawhat Luffy spits in the face of logic and predictability.