Other salient arguments of the book are that money is a system of mutual trust; that capitalism is a religion rather than only an economic theory;that agricultural revolution started as a promise of luxury but ended as a trap that made people’s life worse; that empire has been the most successful political system of the last 2,000 years; that money, empires and religions are the powers that are unifying the world; that the treatment of domesticated animals is among the worst crimes in history; that people today are not significantly happier than in past eras;[6] and that humans are currently in the process of upgrading themselves into gods.