Why does Long John Silver start a mutiny?

Answer 1

Well there wasn't really a good reason for mutiny, but he wanted the treasure for himself and he didn't want the good men to have it. So he was with pirate flint and he thought a pirate from that crew should get that treasure not rich men.

Answer 2

Long John Silver starts a mutiny in the novel "Treasure Island" because he is a deceitful and self-serving pirate who sees an opportunity to take over the ship and gain control of the treasure. He betrays the crew and initiates the mutiny to further his own agenda and secure the treasure for himself.