Orwell uses the phrase "unalterable law of life" on page 111 to express Benjamin¨s ideas. what does he mean? Why has he used the word "unalterable"?

Benjamin is old enough and wise enough to understand that there can never be an "animal utopia". Animal nature, a metaphor for human nature, means that there will always be the powerful oppressing the weak and ignorant.

“Only old Benjamin professed to remember every detail of his long life and to know that things never had been, nor ever could be much better or much worse--hunger, hardship, and disappointment being, so he said, the unalterable law of life.”

Who was cheating in the card game why do you think so does it matter