As many others have stated in this thread, good interpersonal skills are an extremely beneficial trait to possess. However, I do not agree with the statement that it is 70% interpersonal, and 30% knowledge. Interpersonal skills are important because having an idea, but no good way to convey it is comparable to that of having a beautiful voice, but no audience to sing too. However, in order to have an idea worthy of sharing, a person must possess a specific level of intellect. Therefore, I believe that this ratio is a bit skewed, and actually varies dependent on which field it is applied too, in order to be successful. For example, business based careers would most likely be 80% interpersonal, and 20% knowledge. Where as, I believe, research based would likely be 60% interpersonal.