It’s a great time for me and my brethren fat cells. After millennia of toeing the line and giving up our stores whenever the muscles and nerves called on us, we’re now taking over. You don’t have to take my word for it. You can see it on the streets every day. More than 35 percent of adult Americans are obese. Not just overweight—obese. Cardiovascular disease? Type 2 diabetes? Cancer?