Terry Pratchett. The last hero (№ 136557)

Lord Vetinari, despite all the education, know how to think like an engineer. If you want to achieve something, find the right spot and make the minimum effort to achieve maximum results. If the point is between the ribs, use the dagger; if this point is between two warring countries, run to the help of the army. The main thing - to find the point, which is the key to solve all problems.