Beth Brooke, global vice chair at the accounting giant Ernest & Young, is one of the dynamos of corporate America and a role model for women around the world. Raised in Indiana and a Purdue grad, Brooke has earned her top spot at Ernst & Young over the past 27 years and now handles the firms strategy, communications and regulatory affairs. At 49, she has accomplished what many other executives only wish they could do: devote equal energy to doing the right thing for the world, her employer and herself.