While in North Dakota as a rising agrochemical executive at Monsanto, Arnold Donald learnt how to win at blackjack from people who were training to become croupiers.

He became so good at it that he would pay for his family’s cruises by playing the game of supposed chance — except he wasn’t taking chances at all.

For him, it was all about winning through calculated strategy, an approach he has taken to turning Carnival into a profit-making machine.