By Vivienne Walt Via Fortune He’s remade the consumer goods company as a model of responsibility. Can he prove his model works? Step out of the frigid drizzle into Unilever’s factory outside ­Liverpool in northern England, and the brightly lit, automated assembly line gleams in stark contrast to the gloom outside. Thousands of bottles shoot down a conveyor belt with a click-clack sound, in a streak of bright purple. Look more closely, and there is an important detail. The new...