A recent article in the APS Observer, “Genetically Ever After,” reviews the research on genetic influences on marriage, divorce, and marital satisfaction. The litmus test for determining the relative contributions of genetic factors versus environment (‘nature vs. nurture’) is the study of fraternal and identical twins. This research shows that there is a genetic component to marital happiness.

For example, studies of twins in the military showed that the rates of marriage and divorce were more strongly linked in twins than in other siblings. It is important to emphasize, however, that environmental factors also play a part.

What about marital happiness? The results are mixed. There is some evidence suggesting that environmental factors are most important, but one group of researchers identified a specific genetic variant that influences bonding behavior. The research found that men who carried this genetic variant were more likely to have marital difficulties and divorce.

Another gene variant, studied by UC Berkeley researcher Robert Levenson, shows that certain individuals are particularly sensitive to emotions in a marriage. For these individuals, the level of negative emotions in a relationship (anger, contempt) or positive emotions (humor, affection) strongly affects marital satisfaction. According to one researcher, these individuals blossom in a marriage when the emotional climate is good and wither when it is bad. Persons who do not have the genetic variant are less sensitive to the emotional climate of the marriage.

The finding that genetic factors play a part in marital satisfaction is not surprising. Other research with twins has shown that genetics can play a part in whether someone is satisfied or dissatisfied with their job and their propensity to emerge as a workplace leader.

Read the entire APS Observer article here.

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