Just because 85% is environmental doesn't mean that there's hope for us all. It's a common mistake to think of genes as unable to be changed and environment to be changed. But, for example, maybe if your mother smokes during pregnancy, it inhibits the part of your brain that handles beat. In that case, the trait is environmental AND innate. For another example think of one-armedness. Most people with one arm will have lost it in an accident, the fact that the trait isn't genetic doesn't mean there is hope for them to have a second arm.