Widespread violence across Bangladesh will soon enter its third month, extending a stranglehold on the economy that has cost the country billions. The world’s second-largest ready-made garments exporter, Bangladesh began the year courting investment to diversify its manufacturing base, currently focused on textiles, to include low-end electronics and automobile assembly. But opposition political forces led by the Bangladesh Nationalist Party began an extended campaign of social unrest following the anniversary of last year’s disputed Jan. 5 elections. The unrest jeopardizes the growth the national economy and textile industry have experienced in recent years.