Nothing scholarly, but as one who has just a dash of that good German blood (my son actually has more, Deo gratias, through his mother), I'd just throw out this much --- strong, resolute, centrally located (within Europe), fairly homogeneous, very intelligent, good at matters of organization, gifted in matters of science, math, and engineering (STEM Nation!), good at logic and philosophical thought --- in short, just a lot of good things that have all come together through the centuries.