Enlightenment Now, I came across a new word: progressphobia. The book is a fervent plea for four central Enlightenment-ideas: reason, science, humanism, and progress. Pinker argues that the combination of these ideas means that humanity, through a greater understanding of reality, due to science, and an increasing circle of sympathy, caused by cosmopolitanism and reason, can make intellectual and moral progress. The aim of Enlightenment-thinkers was not so much to change human nature but to build institutions which would bring out the best sides of human nature. According to Pinker, these ideas need to be defended more than ever.