""The Endless Future of the Human Race: A Letter to a Friend"" is a philosophical and thought-provoking book written by Caleb Sprague Henry. In this book, Henry explores the concept of human existence and the future of our species. He argues that the human race is capable of achieving great things and that our potential is limitless. He also discusses the challenges that humanity faces, such as climate change, overpopulation, and resource depletion,...