Abraham Lincoln was known for his uncanny knack to lead others – even those with whom he disagreed. Click here for a great book on the subject. He was also known for his ability to simplify. One story goes that he would often line up troops from the most senior rank to the lowest. He would then begin at the lowest ranking soldier and ask him to explain the next mission objective, and why they were pursuing that course. If the lowest ranking soldier could not answer quickly with utmost confidence, Lincoln would berate the highest-ranking leader.