These are special times for us humans. After learning and growing and evolving for over five million years, our species has, just in the past few years, arrived at a momentous milestone: we have achieved the power to manipulate our own genes. The recent discovery of epigenetics has enabled us to make conscious lifestyle choices that change—and enhance—the way our genes will be expressed. For the first time ever, genetic events inside your body and brain are under your conscious control. Applying the principles of epigenetics (described below) empowers you to change your genetic and cognitive destiny. Thanks to this new science, whether you have a healthy, dementia-resistant brain is completely up to you.