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When Polman became CEO of the Anglo-Dutch multinational Unilever, in January 2009, it was his first time in the role of chief executive. That doesn't appear to have inhibited him: Since then he has transformed Unilever into one of the world's most innovative corporations. In addition to abolishing earnings guidance and quarterly reporting (on day one as CEO), he launched a plan to double corporate revenue by 2020 while simultaneously reducing the company's environmental impact by half. These are truly "audacious objectives," he acknowledges. "Nobody has ever made such a public commitment, and nobody has ever achieved anything like this." Polman believes that his initiatives build on the company's founding values: improving health and hygiene, and otherwise benefiting society. Though "a capitalist at heart," he thinks the system needs fine-tuning--in part through socially responsible investment. The Unilever Sustainable Living Plan not only sets ambitious targets but establishes detailed measures of progress toward them. Doing away with quarterly reporting has allowed the business to be more focused on the long term, and changes in the compensation system support that. In this edited interview with HBR's editor in chief, Polman talks about taking risks, attracting shareholders who support Unilever's strategy (hedge fund investors needn't apply), and why consumers are now in charge.

When Muhtar Kent took the helm at Coke, in 2008, he had two top priorities: to establish a long-term vision and to restore growth in North America. The vision called for doubling Coke's business in 10 years-something "not for the fainthearted," Kent says, "but clearly doable." In this edited interview he talks about the role of social media (Coke has 33 million Facebook fans), which today get 20% of the company's total media spend; the importance of creating sustainable communities to preserve the future of the business; and Coke's commitment to water neutrality by 2020-which means giving back a liter of water for every one the company uses. As the CEO of a company with 140,000 employees, Kent says, "you can only influence." He takes a low-key approach, treasures the team, and loves to visit supermarkets and observe customers.

Bob Iger became Disney's CEO in 2005, following a rough five years for the company that included a hostile takeover attempt, a shareholder revolt, and a battle with two prominent board members. High on his agenda was ending the internal warfare and winning back employees' enthusiasm and admiration. He also needed to help the company see technology as an opportunity rather than a threat and to strike the right balance between tradition and innovation. It was time, for example, to move on to computer-generated animation-and even to update the bland Mickey Mouse, who was originally meant to be impish and irreverent. (Donald Duck filled that role after Mickey became a corporate symbol and a role model for kids.) Iger is a strong believer in taking big risks, in being accessible, and in paying attention to one's instincts. He's driven by challenges-as an early experience shows: At the age of 23 he was told by his boss that he wasn't promotable. He believes that a CEO's role involves determining strategy; establishing ethics for the company, its employees, and its products; and hiring and motivating great people. In this edited interview with HBR's editor in chief, Iger talks about executive compensation, the changing nature of stock ownership, Disney's use of social media, and the company's new theme park in Shanghai.

John Donahoe took over for Meg Whitman, eBay's celebrated longtime CEO, just under three years ago. The core business was slipping, and eBay's acquisition of Skype had gone wrong. The challenge facing him was how to keep the company strong despite enormous changes in consumer behavior. He talks about capitalizing on mobile technology-eBay's iPhone application, "by far the largest m-commerce application in the world," went from $600 million in volume in 2009 to between $1.5 billion and $2 billion in 2010-and breaking down the barriers between online and offline. The company's acquisitions of RedLaser and Milo, for example, mean that you can walk into a store, scan an item you want with your smartphone, and learn its price both across the web and at merchants within five or 10 miles of you. Because the ability to search for products on the Internet has undercut the power of eBay's auctions, Donahoe is working to make its marketplace indifferent to format. He expects that fixed-price sales will eventually account for 70% of transactions. But that will require re-architecting almost every element of the business system.

Two years ago Starbucks ran into trouble, and Schultz was called on to serve a second time as its CEO. In this edited interview, he talks about the effects of the financial crisis on Starbucks's sales, the surge of competition, the blogosphere, and retaining authenticity in spite of growth. Schultz calls values, culture, and Starbucks's reservoir of trust with its employees "the only assets we have as a company." He saw preserving and enhancing the integrity of those assets as his primary challenge. That meant declining to franchise the system or compromise on quality or change the company's generous health care coverage. One bold move was to take 10,000 store managers to New Orleans for a conference that began with more than 50,000 hours of community service and an investment in local projects of $1 million. The purpose of the conference was to galvanize the entire leadership of the company and to stress personal accountability and responsibility. Schultz believes that without that experience, he couldn't have turned things around for Starbucks.