After graduating with her MBA in 2016, Margaret Nyamumbo took a job in investment banking — a gig that was not only lucrative, but intellectually stimulating. Nyamumbo had every intention of staying in banking and climbing the corporate ladder, but the work she was doing — analyzing consumer goods companies — seemed to be pulling her in another direction. “I learned how different brands had been started, and I realized that brands, even Fortune 500 companies that are household names, at one poin

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