A guide to address the urgent crisis of our time—the loss of significance in our lives—by restoring mattering as the missing link between personal well-being and collective repair.

John R. Miles argues that many of today’s most common struggles—burnout, anxiety, loneliness, and disengagement—are not personal failures or mindset problems. They are the result of unmattering: the gradual erosion of felt significance within modern systems that reward performance while overlooking presence. Drawing on research in psychology, neuroscience, social science, and contemplative traditions, as well as deeply personal stories, Miles shows that mattering is not a belief or personality trait, but rather a necessary condition of human functioning. When our systems overload, the result is exhaustion, self-erasure, and quiet despair. Where others have also diagnosed the problem, Miles offers a solution through M.A.T.T.E.R., a research-based framework based on six elements—meaning, autonomy, trust, time, energy, and reciprocity—that, when used together, can reverse the process and restore sustainable significance, dignity, and spiritual coherence. Inspired by hundreds of conversations with today's researchers and thought leaders, the framework helps you gain clarity on why success doesn't erase emptiness and how to change that; offers practical tools to break harmful habits and create new ones; helps you make a plan to feel valued in your work, your home, and your community; and reminds you that your presence matters.