Brazilâs diversity-celebrating ethos seems to help women rather than hinder them. Macho men donât mind having women bosses as long as the women bosses are women. So Dilma has a 77% approval rating, and the national oil company, Petrobras, has just appointed a woman, Maria das GraÃ§as Foster, as its CEO. And Brazil isnât alone. Argentina and Chile have both had women presidents.