I'm undoubtedly going to get virtually molested for making statements like these, but whatever... It's my honest and humble opinion that, because of "Escape from Alcatraz" (and perhaps 2 or 3 other solid but underrated prison dramas), a film like "The Shawshank Redemption" does not deserve to be labeled as one of the greatest - or even THE greatest, according to this wonderful website - movie of all time. Don't crucify me just yet. I do concur "Shawshank" is a great film, but so many of the original and brilliant aspects that its fans praise and worship so much already featured here first, in this genius fifth (and final) collaboration between director Don Siegel and anti-hero Clint Eastwood. I won't go as far to claim the script/novel of "Shawshank Redemption" is a rip-off (although it wouldn't be the first time Stephen King steals from other sources) but it's definitely a big influence and inspiration.
The most astounding trick Siegel and Eastwood pull, is serving us a slow-paced and atmospheric drama rather than an exhilarating action flick, and yet it doesn't at all feel like a swindle. "Escape from Alcatraz" is a stoic and slow brooding, yet compelling depiction of prison life, its strict routines and its lack of privileges. The titular escape, which largely exists of tunneling out with a pair of nail clippers (!), is often even a mere footnote, while the real essence revolves around the solidarity between inmates and their collective fist against the corrupt prison authorities.
Needless to say, Eastwood is at his best portraying a cool, distant, arrogant and enigmatic Frank Morris. From the moment he arrives at Alcatraz, it's more than obvious that his sole mission will be to escape, even though the megalomaniacal head warden fanatically makes it clear The Rock is impossible to escape from. The latter is a strong role for Patrick McGoohan, by the way. Great, great film. No nonsense, no unnecessary dialogs or redundant sub plots, just pure craftmanship!