“Everything Starbucks did in the past, more or less, had worked,” Mr. Schultz said in an interview in January at the company’s headquarters, with a view of Puget Sound south of downtown Seattle. “Every store we opened was successful, every city, every country.”

He continued: “Growth had a life of its own  and that’s O.K., when you’re hitting the cover off the ball every time, but at some point, nothing lasts forever.”

One thing hasn’t changed: the man dreams big. In that same interview, Mr. Schultz spoke of expanding into still more products and in markets like China. He is pushing, of all things, a brand of instant coffee. The words “Starbucks Coffee” were just removed from the company’s green mermaid logo because he wants to waltz his brand up and down the grocery aisles. On Thursday, he announced that the company had struck a deal with Green Mountain Coffee Roasters to distribute Starbucks coffee and teas for Keurig single-serving systems. Shares of Starbucks jumped nearly 10 percent on the news, reaching their highest level since 2006. The stock closed at $36.56 on Friday.

Mr. Schultz and his colleagues say Starbucks will keep its feet on the ground this time, but some outsiders have doubts. Detractors say Starbucks long ago ceded its role as a gourmet tastemaker to become a “billions-and-billions served” chain like McDonald’s. Starbucks  “Charbucks,” to those who complain that its heavily roasted coffee tastes burned  will never rekindle the old romance, these people say.

“Has anybody said they came back because people love the coffee again?” asks Bryant Simon, a history professor at Temple University and author of “Everything but the Coffee: Learning About America From Starbucks.”

“They came back because they’re remaking themselves as a brand that competes on value, largely  a brand that’s everywhere, easily accessible, predictable,” Mr. Simon says.

HOWARD SCHULTZ, now 57, is a tall, sinewy man with a toothy grin and a silky sales pitch. He rarely sticks to script, preferring to speak off the cuff, whatever his audience. In conversations, he leans in, locks eyes and gives the impression that, right now, there is no one else in the world he would rather be talking to. When he speaks of “soul” and “authenticity” and “love,” you could almost forget that he runs a multibillion-dollar business that has become an uneasy symbol of globalization. Or that the British actor Rupert Everett once likened Starbucks to a metastasizing cancer.