These 65 essays reflect my personal journey to understand the three modern-day horsemen of the apocalypse who stalk mankind: climate change, peak oil, and population growth. What I found was not reassuring. But don’t take my word for any of this. Learn about the issues and make up your own mind. If you come to the same conclusions I did, then you really need to start thinking about how to prepare your children and grandchildren for a world that will be very different from the one they see around them today … a world as challenging as anything that mankind has ever faced.