No one individual can be proficient in all facets of marketing (strategic, analytic, creative, technical, etc) – this is where humility comes in. Without humility, a team is unable to learn. Learning is critical in this ever changing world. Without humility, we fail to create space for someone else on the team to contribute. And, we all could use all the help we can get. Without humility, it is hard to imagine a team working together. Without a team, I’d say it’s hard to imagine marketing being effective.