Every two years, the International Association for the Study of Pain publishes a compendium of benchmark papers that summarize the current status of pain research, treatment, and management throughout the world. Presented at the 17^th World congress on Pain in Boston, Massachusetts, in September 2018, these papers represent the thinking of the world’s top pain scientists and clinicians. IASP distributes this book to participants in the Refresher courses, and it is now available to pain researchers and clinicians who were unable to attend the Congress.