 To help the working class, Napoleon III offered a prize to anyone who could develop an inexpensive substitute for butter; the prize was won by the French chemist Hippolyte Mège-Mouriès, who in 1869 patented a product he named oleomargarine, later shortened simply to margarine.His most important social reform was the 1864 law that gave French workers the right to strike, which had been forbidden since 1810.In 1866, he added to this an "Edict of Tolerance," which gave factory workers the right to organize.