Contrary to what one reviewer said, Singer does not teach that all human beings are not persons. He argues that some human beings are not persons, and that some do not have a right to life. If you don't like these views, I suggest you take Singer, and this book, very seriously. Taking your opponent seriously is often the best way to get your opponent's supporters, if not your opponent, to switch sides. Alternatively, if you find yourself disagreeing with Singer's conclusions, but none of his premises, then perhaps you should switch sides. Singer certainly is not right about everything, but Practical Ethics is still a classic and accessible introduction to applied ethics, well worth a read through.