The slogan "You've come a long way, baby" is a better fit for products from Victoria's Secret than cigarettes and cars. In the early 1920s, women bundled themselves up and flattened their chests. These flappers of the Jazz Age were far from comfortable. Today women are comfortable and liberated; sheer, sensual and seamless is in; and nothing is left to the imagination. Ida Rosenthal, more than any other person, is responsible for this revolution. And she made a mint from it. Ida was a revolutionary. Born Ida Kaganovich on Jan. 9, 1886, in a small town west of Minsk, Belarus, she grew up in a traditional Jewish family. Her father was a Talmudic scholar who spent his hours wading through religious books, while her mother ran a small general store and kept the family alive.