In response to the debate of whether or not there is a 70:30 ratio of importance of interpersonal skills over technical skills, jl959 makes a good point. Stating that this is not true in all cases due to different work environments is 100% true. Interpersonal skills are incredibly valuable in so many ways from presenting well in an interview, getting your point across clearly while working on a project, or simply getting along with co-workers. So it is clear that interpersonal skills are very important. However, many jobs may not entail working largely with others. In a situation where you are working on a project alone, and for the most part don’t have co-workers or supervisors to work alongside with, then yes technical knowledge becomes much more important than interpersonal skills. But in real-world situations, I think it is far more common to have a project not solely resting on the shoulders of one person, and more often than not handled by a team at least in part. For that reason it makes sense to claim that there is a 70:30 ratio of importance between interpersonal skills and technical knowledge.