In this excerpt, the sergeant major is discussing the monkey's paw, an object that is central to the story "The Monkey's Paw" by W.W. Jacobs. The phrase "It had a spell put on it by an old fakir" refers to the idea that the monkey's paw is enchanted or cursed. The old fakir, a figure of wisdom and perhaps mysticism, has placed a spell on the paw to demonstrate a moral lesson about the nature of fate and the consequences of tampering with it.
When the sergeant major mentions that "fate ruled people's lives," he is highlighting the theme that trying to control or change one's destiny can lead to unintended and often disastrous consequences. The fact that each person can make three wishes from the paw suggests that while they have the power to make wishes, they are ultimately at the mercy of fate, which can interpret those wishes in unforeseen ways.
This serves as a cautionary tale: while humans may desire to change their circumstances, the outcome of their wishes may not align with their intentions. The wishes can lead to misery and tragedy instead of the expected fulfillment or happiness, reinforcing the idea that some aspects of life are beyond our control. The sergeant major's warning is meant to prompt the characters—and readers—to consider the implications of their desires and the nature of fate itself.