For thousands of years, long before there was such a thing as a science of chemistry, people were fascinated by plants, because they knew that plants contained substances that could affect people. Coffee will keep you awake. Tobacco contains something that will calm your nerves. Foxglove contains an extract that'll affect your heart.
Leadership contains certain elements of good management, but it requires that you inspire, that you build durable trust. For an organization to be not just good but to win, leadership means evoking participation larger than the job description, commitment deeper than any job contract's wording.