Two major groups of couples: the masters and the disasters.
… Contempt, they have found, is the number one factor that tears couples apart. People who are focused on criticizing their partners miss a whopping 50 percent of positive things their partners are doing and they see negativity when it's not there. People who give their partner the cold shoulder—deliberately ignoring the partner or responding minimally—damage the relationship by making their partner feel worthless and invisible, as if they're not there, not valued. And people who treat their partners with contempt and criticize them not only kill the love in the relationship, but they also kill their partner's ability to fight off viruses and cancers. Being mean is the death knell of relationships.
Kindness, on the other hand, glues couples together. Research independent from theirs has shown that kindness (along with emotional stability) is the most important predictor of satisfaction and stability in a marriage…
There are two ways to think about kindness. You can think about it as a fixed trait: either you have it or you don't. Or you could think of kindness as a muscle. In some people, that muscle is naturally stronger than in others, but it can grow stronger in everyone with exercise. Masters tend to think about kindness as a muscle. They know that they have to exercise it to keep it in shape. They know, in other words, that a good relationship requires sustained hard work.
… There are many reasons why relationships fail, but if you look at what drives the deterioration of many relationships, it's often a breakdown of kindness. As the normal stresses of a life together pile up—with children, career, friend, in-laws, and other distractions crowding out the time for romance and intimacy—couples may put less effort into their relationship and let the petty grievances they hold against one another tear them apart. In most marriages, levels of satisfaction drop dramatically within the first few years together. But among couples who not only endure, but live happily together for years and years, the spirit of kindness and generosity guides them forward.
Masters of Love
Every day in June, the most popular wedding month of the year, about 13,000 American couples will say "I do," committing to a lifelong relationship that will be full of friendship, joy, and love that will carry them forward to their final days on this earth.
Except, of course, it doesn't work out that way for most people. The majority of marriages fail, either ending in divorce and separation or devolving into bitterness and dysfunction. Of all the people who get married, only three in ten remain in healthy, happy marriages, as psychologist Ty Tashiro points out in his book The Science of Happily Ever After, which was published earlier this year.