Testimony in the federal court trial over California’s Proposition 8 ended Wednesday in San Francisco with an advocate of male-female marriage maintaining that the rights of gays and lesbians must give way to society’s interest in promoting traditional families.

Sponsors of the 2008 constitutional amendment called David Blankenhorn, founder of the Institute for American Values, to make the case that allowing gay and lesbian weddings would weaken marriage – a potentially decisive issue in the clash over the ballot measure’s constitutionality.

In two days of testimony, Blankenhorn predicted fewer heterosexual marriages and more divorces and one-parent households if marital rights are extended to homosexuals.

Read the rest of Bob Egelko’s San Francisco Chronicle article here.