The Simple Science of a Happy Family. From raising children to getting along with in-laws, what do people with close and loving families do differently than those with strained or unfulfilling relationships? Sociologists, therapists, and psychiatrists have spent entire careers investigating the ins and outs of family dynamics, yet their findings are inaccessible to ordinary people, hidden in obscure journals to be shared with other experts. Now, David Niven, the international bestselling author of The 100 Simple Secret series has collected the most current and significant data from more than a thousand of the best scientific studies on families and then spelled out the findings in plain English. The advice is based not on one person's unique experiences or opinions, but offers for the first time the research of noted scientists studying average American families. These findings have been boiled down to one hundred essential ways to find and maintain love, joy, and satisfaction in all family relati