Milton Friedman held unswervingly to his principles, but was more pragmatic than some of his modern-day followers.

WSJ: What Would Milton Friedman Do Now?

Kodak failed to do the same, and is now suffering because the market it unswervingly served has vanished.

FORBES: CES: No Kodak, No SanDisk

Still, he says, he followed a fil rouge--a red thread--that led him unswervingly toward Switzerland's grand patrimoine de l'horlogerie.

FORBES: Time Is Money

His notions of the future remained unswervingly radical.

ECONOMIST: Sir Arthur C. Clarke, visionary, died on March 18th, aged 90