The budding strategists should read up on him. He is one of the best in assessing what trend is relevant in the business of national security.
In an interview in 2012 the main author of four of the Chinese defence white papers General Chen Zhou stated that Marshall was one of the most important and influential figures in changing Chinese defence thinking in the 1990s and 2000s.
Foreign Policy named Marshall one of its 2012 Top 100 Global Thinkers, "for thinking way, way outside the Pentagon box" - Wikipedia
Click here, here, here, here and here for more information on him.
From a Wired 2003, interview
Q: Does new technology ultimately make us more or less vulnerable?
A: A friend of mine, Yale economist Martin Shubik, says an important way to think about the world is to draw a curve of the number of people 10 determined men can kill before they are put down themselves, and how that has varied over time. His claim is that it wasn't very many for a long time, and now it's going up. In that sense, it's not just the US. All the world is getting less safe.
So how does one focuses on the future without being too mindfully aware of the present? The initial step begins by possessing the conscious feeling of no constraints and no worry of danger before identifying the on-coming trends. Estimating the range, the complexity of this any on-coming trend before connecting its inner attributes to the configuration of the Big Tangible Picture, is the macro step that most people have trouble performing.
Assessing the tangibility of a trend by testing the extensiveness of its after-effect in a strategic simulation setting. To most people, it is quite tricky but not impossible.
Those who seriously studied Yiquan, would understand that sole point from the practice of centering oneself.