why was marie antoinette unpopular

The life of Queen Marie-Antoinette, Part 2

At a ball in 1781, Marie-Antoinette was dressed in a blue gown all sprinkled with sapphires and diamonds; beautiful, young, adored by all, having just given a Dauphin to France, not dreaming of the possibility of a backward step in her brilliant career, she was already on the edge of the abyss. What happened to the Queen, and why was she so unpopular in France?