PROVIDENCE — A small group of workers’-rights advocates chomped on pizza and engaged in lively conversation Saturday afternoon, just before a 38-year-old Bangladeshi labor leader attracted their attention.

The organizer, Babul Akhter, had the ashen expression of a man who faces a death sentence.

His story was about his own plight and also about the suffering of Bangladeshi garment workers, including hundreds who have been burned alive in factory fires over the past four years....

New Yorkers’ fierce fight to prevent Wal-Mart from setting up shop in the city is well-known. But meanwhile, other big-box stores are quietly opening without a murmur of protest, like an Aldi store that launched in Rego Park, Queens, in February.

“People say that somehow New York City should erect a wall against Wal-Mart,” said Greg David, director of the business and economics reporting program at the City University of New York. “But Home Depot, Target, Kohl’s, the warehouse stores, now Aldi, are in important ways just like Wal-Mart.”

Cynthia Murray and Robert Hines Jr. thought they had seen unfair treatment and bad working conditions at the Maryland Wal-Mart store and Chicago-area Wal-Mart warehouse where they worked, respectively. But they were floored to learn recently of the conditions workers in Bangladesh and other developing countries endure in the factories that produce goods for Wal-Mart.

NEW YORK — Tragic as the Triangle Shirtwaist Factory fire was, the most definitive moment of Thursday’s all-day symposium honoring its centennial was an impromptu exercise that reminded guests just how far removed they are from the factories that produce the clothes they wear.