Bilton, T., K. Bonnett and P. Jones (1987) Introductory Sociology, 2nd edition. London: Macmillan, p. 301

As laws and procedures regulating divorce have altered, the divorce rate has tended to increase by leaps and bounds; with each new piece of legislation making divorce more readily available, the rate has risen rapidly for a time before levelling off. Today there is one divorce in Britain for every three marriages. (In the USA the rate is one in two.) Many people have suggested that the higher divorce rates reflect an underlying increase in marital instability; the problem with this argument is that we have no way of knowing how many 'unstable' or 'unhappy' marriages existed before legislation made it possible to dissolve them in a public (and recordable) form. Some commentators have gone further, and argued that more permissive divorce laws in themselves cause marital breakdown. But we can certainly be sceptical of such a view, suggesting as it does that happily married couples can suddenly be persuaded to abandon their relationship, propelled by the attraction of a new divorce law. A more plausible explanation for rises in the divorce rate after the passage of a law is that unhappily married couples were for the first time given access to a legal solution to pre-existent marital problems; in other words, changes in divorce laws are less likely to cause marital breakdown than to provide new types of solution where breakdown has already occurred.