The Gottmans under-state the significance of this book by implication, with the type of title they gave it. But the take-away is that they found the single variable most correlated with long, happy relationships: how partners respond to bids for attention. Though the authors only discuss the context of amatonormative marriages, this finding, through the lens of the experienced Gottmans, is valuable insight for friendships and any kind of emotional intimacy partners wish to maintain.