I answered this question some two months ago. Let me fetch the answer.
https://www.reddit.com/r/AskHistorians/comments/gb2zl9/dear_historians_of_reddit_what_motivated_the/
This one is also relevant
https://www.reddit.com/r/AskHistorians/comments/goqw20/how_close_was_columbus_to_mutiny_on_his_first/