Discover the unexpected ways friends influence our personalities, choices, emotions, and even physical health in this fun and compelling examination of friendship, based on the latest scientific research and ever-relatable anecdotes. Why is dinner with friends often more laughter filled and less fraught than a meal with family? Although some say it's because we choose our friends, it's also because we expect less of them than we do of relatives. While we're busy scrutinizing our romantic relationships and family dramas, our friends are quietly but strongly influencing everything from the articles we read to our weight fluctuations, from our sex lives to our overall happiness levels. Evolutionary psychologists have long theorized that friendship has roots in our early dependence on others for survival. These days, we still cherish friends but tend to undervalue their role in our lives. However, the skills one needs to make good friends are among the very skills that lead to success in life, and scientific research has recently exploded with insights about the meaningful and enduring ways friendships influence us. With people marrying later-and often not at all-and more families having just one child, these relationships may be gaining in importance. The evidence even suggests that at times friends have a greater hand in our development and well-being than do our romantic partners and relatives. Friendfluence surveys online-only pals, friend breakups, the power of social networks, envy, peer pressure, the dark side of amicable ties, and many other varieties of friendship. Told with warmth, scientific rigor, and a dash of humor, Friendfluence not only illuminates and interprets the science but draws on clinical psychology and philosophy to help listeners evaluate and navigate their own important friendships.