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But few heeded the church’s advice. Mr. Estrada was elected with the largest victory margin in Philippine history. Halfway through his six-year presidency, in January 2001, he was confronted with another “people power” revolt, backed by political opponents and the military, and was forced to resign.

His successor, Gloria Macapagal Arroyo, styled herself as a devout Catholic and sought to placate the church by abolishing the death penalty and putting brakes on the contraceptives law, which languished in Congress during her nine years in power.

It mattered little. Mrs. Arroyo’s mismanagement and corruption scandals set the stage for Mr. Aquino’s election on a promise to rid the Philippines of graft, fix the economy and lift millions out of poverty. The scion of the country’s democracy icon took power several years after Sin’s death, but it was a different era, in which the church was battered by scandals of sexual misconduct of priests and declining family values.

The latest defeat of the church “can further weaken its moral authority at a time when this is most badly needed in many areas, including defense of a whole range of family values,” said the Rev. John J. Carroll, founding chairman of the Jesuit-run John J. Carroll Institute on Church and Social Issues. He said he wondered how many Catholics have been “turned off” by incessant sermons and prayers led by the church against the contraceptives law, and how much it contributed to rising anti-clericalism and the erosion of church authority.

“People today are more practical,” said Mr. Labadan, the street vendor. “In the old days, people feared that if you defy the church, it will be the end of the world.”

• Associated Press writers Jim Gomez and Teresa Cerojano contributed to this article.