"From our earliest existence to our most advanced stages, we have survived." On Human Survival does not debate the reasons why this is the case, but focuses on the means by which we will continue to survive as a species. This can only be done by our use of reason, common sense, and logic. Threats to our survival are everywhere, yet we all make the common mistake of misinterpreting when those threats actually threaten us. By using logic, we can better understand the actual threats to our survival, such as an outbreak of disease, and the perceived threats, such as terrorism. Only when we can distinguish between the two can we dramatically impact our chances of long-term survival. Common sense tells us that if we wish to see something, we must first look. There are many complex challenges we face as a species. Our ignorance of reason should not be one of them. While it may not provide us with all of the solutions, most of the answers can be found if we merely open our eyes.