Unmetered intelligence--limitless cognitive capacity at near-zero cost--is remaking the systems we live and work in, and opening a path to genuine human flourishing. In The Next RenAIssance, AI pioneer and former Head of Go-To-Market at OpenAI, Zack Kass, explains how successfully navigating this chapter will require both embracing technology and protecting the human qualities and experiences that AI can't replicate. As cognition commoditizes, how and why humans differentiate will radically change. Humanity will be more capable of answering questions we've long pondered--how to build clean energy, design better drugs, and personalize education at scale--while discovering new ones we never knew to ask. Kass draws a crucial distinction between what AI can do--the technological threshold--and what we allow it to do--the societal threshold, and how to navigate the adoption gap between them, which will define the next decade. Through both individual and societal lenses, Kass addresses the costs of progress, including dehumanization, identity displacement, and idiocracy. He also surfaces the monumental questions AI forces us to face, including ecology, purpose, and our social constructs. And he examines how unmetered intelligence will affect four critical domains in the near future: work, healthcare, education, and finance. Grounded yet non-obvious, the book explores a world where intelligence becomes abundant, and humans might be forced to reinvest in our most immutable qualities. Kass closes with a humane playbook that proposes how to act, lead, and design a life anchored in human values as technology evolves. Kass ultimately aims to prove that hope and reason should coexist. The result is a hopeful blueprint for turning unprecedented capability into a more creative, equitable, and prosperous world.