If you are reading this book in the year 2055—assuming you're still using a year system based on the Common Era (a year is the time taken by the planet you're on to go around the sun once)—congratulations! You have survived. This book is written in the year 2018, and we as humans have much to worry about in terms of the survival of our species.
By and large, we have managed to work our way into a relatively stable peace, but the future of our species as a whole is somewhat at risk from various threats. Most of these threats have been caused by our own actions in the past. I'd like to emphasize a point here: I'm not assigning blame to anyone in the past for causing these threats. Our ancestors were busy optimizing to different goals, and the threats are typically an unforeseen/unforeseeable side...