Psychology gives you a way of thinking about how to interpret and explore behavior. Much like physics relates to engineering, or biology relates to medicine, psychology provides the basic theories that other fields then apply to great effect. The fields that apply psychology’s understanding of human nature include law, politics, marketing, business, economics, industrial design, writing, and virtually any other area that deals with people or human factors. And just like you’d be upset at a doctor who doesn’t know anything about biology, you should be upset by politicians who ignore human nature when creating policy, businesses that don’t understand their customers, and products that confuse and frustrate consumers. Luckily, you know better: you have Psychology for Life.