The heart of Buddhist thought is its insight philosophy, which uses critical inquiry to challenge dogma and to reveal how seemingly fixed ideas are more arbitrary than we might think. Applying this philosophy, we see that social customs are not fixed laws but evolving conventions that serve a purpose in a particular culture and time. Marriage is one of these conventions. It is not a rigid law but a social custom that evolves.
The history of marriage supports this view. Throughout most of Western history, marriage was a negotiated arrangement between families, not a romantic choice. Women were not accorded the same marriage rights as men, interracial marriage was forbidden, interfaith marriage was shunned, and divorce was often illegal or granted only with permission.
Today, Western marriage is almost unrecognizable compared to these earlier forms. Marriage is now a consensual choice. Women have equal rights, laws banning interracial marriage have been struck down, interfaith marriage is common, and individuals can divorce freely.