I didn't vote, because I didn't find a question that I felt applied.
As Tuner noted, the reasons are many, but if there is a leading cause, it is too much recoil spring.
The media, in it's infinite experience and wisdom, often recommends replacing the factory spring with a stronger one. According to them,
"this gives you greater control for fast double-taps, more positive feeding, reduces gun battering, and even cooks breakfast for you before you go shooting."
Most folks would be better served to leave the dang stock springs alone.
Couple that with a quick glance through the Brownell's catalog, and you find that with the possible exception of the AR-15, more after-market parts, accessories, and useless do-dad's in various quality levels are sold for the 1911 then all other guns combined.
That makes every shade-tree mechanic with a big hammer, a medium screwdriver, and a Credit Card an expert 1911 gunsmith.
Right?
Then, after Billy-Bob buys or builds his first 1911, he finds out those big bullets cost a lot more, and 230 grain hard-ball kicks a little more then he is used to with his 9mm.
So, he takes up reloading to save money and tailer his ammo to his recoil tolerance level.
He uses fast powder in small doses to save .01 cent a round on reload expenses.
Add it all up (junk advice, junk guns, and junk ammo) and you may have a few problems with a few 1911's.
rcmodel