A new edition to Arcturus's growing list of non-fiction classics, On Happiness contains the Greek philosopher's teachings about life and death, religion and science, happiness, friendship and morality. His views were influential on later scientists and philosophers, such as Isaac Newton, Thomas Hobbes and Karl Marx, given his thoughts on the value of scientific observation as the only way to prove theories and also his promotion of the idea that living a simple, modest life was the way to happiness.