There is a long list of celebrated partnerships behind some of the biggest brands today – Steve Jobs and Steve Wozniak of Apple, Amanda Johnson and KJ Miller of Mented Cosmetics, Anne Wojcicki and Linda Avey of 23andMe, Morgan DeBaun, Jonathan Jackson, Jeff Nelson, and Aaron Samuels of Blavity, Ben Cohen and Jerry Greenfield of, well, Ben & Jerry’s, of course. All of these storied partnerships have had their fair share of successes and challenges.