This book tries to look at human thought and action from a scientific perspective, and in the process, acquaints the reader with essential concepts about science and its history. It takes a broad look at our present troubles without overlooking some crucial historical, religious, and political causes but places science at the center stage. The author applies what he has learned throughout his career to go beyond science. After an introduction setting the scene and a review of the "scientific temper" and the inexcusable ignorance of science by some leaders and many followers, the author turns his sharp vision to look at other issues. The most significant challenges are critical and global: climate change caused by our activities, stockpiles of nuclear weapons that are a constant threat, population growth, and increasing inequality at all levels. These problems do have a profound ethical character and threaten to end forever with our misery, producing a "catastrophic convergence". Written with rigor for all readers, with many references and infused with relevant quotations, the author's message is clear: we need to change our ways drastically and urgently, now or never. But he offers not much in terms of a solution, something done by many authors to sweeten the pill, because as he argues, beyond lofty declarations, there is no real solution as the clock runs down, leading to his dystopian view of the future.