John Gottman did a ton of research on how couples stay together, and bizarrely the amount a couple fights/argues has no correlation to whether or not the couple will stay together. It's more about HOW they argue. Does the couple threaten to leave every time they argue, or do they know they will both stick it out even when things get difficult? Do the couples argue about the issues, or do they make the arguments personal? Does the couple have a sense of humor about their problems? Does the couple have contempt for each other? Does the couple take opportunities to turn towards each other? Does the couple fight to win and eviscerate each other, or do they fight to resolve important issues to the point that they compromise to a place where they can live with the compromise? Dr. Gottman says that 60% of issues will never be resolved in even the best of marriages. It's not being able to resolve the issues that makes a couple strong, it is a willingness to live with the issues and work around the issues that makes the couple survive. Making it to your 50th wedding anniversary requires a ton of work and a ton of commitment, and most couples will generally have their fair share of fights in 50 years. Staying together in spite of the fights and not making the fights too personal or too serious is what it is all about.