MADRID, Spain (AP) _ Hundreds of thousands of people have attended a Sunday Mass in central Madrid to promote traditional family values in predominantly Roman Catholic Spain. Spain's Socialist government has angered the church by legalizing gay marriage, making it easy for people to divorce and instituting a public school course in which children learn about homosexuality and same-sex marriages. It is also considering easing Spain's restrictive abortion law. The outdoor service in a chilly downtown plaza started with a message from Pope Benedict, who urged Spanish Catholics to keep their families strong. The archbishop of Madrid added that humanity's future depends on "the Christian family.''