Laughing matters. It always has. But laughing may matter even more in modern times. Does anyone think that during the Middle Ages, or even in the late 19th century, ordinary citizens spent as much time laughing at the popular culture of the day as they have during the past 110 years? No way. And that’s because that gift from the gods known as movie comedy made laughing matter more than ever before. The first global celebrity was Charlie Chaplin, the master silent-movie comedian. It was he who established that going to the movies would be an act wired, in a primal and essential way, to the G-spot of hilarity. And once Hollywood got audiences laughing, no one wanted to stop. The slapstick genius of the silent clowns; the joyful lunacy of the Marx Brothers; the riotous repartee of screwball comedy; the sick-joke revolution of “Dr. Strangelove”; the prankster surrealism of Mel Brooks and Woody Allen; the midnight madness of John Waters; the unleashed anarchy of the “Saturday Night Live” generation; the barely controlled chaos of Jim Carrey … in compiling our list of the all-time greatest screen comedies, we thought long and hard about what makes a classic. But mostly we heeded the call of our funny bones. We hope these movies tickle yours as much as they do ours.