Most influential burger? Not Big Mac, but...
The most influential burger of all time is the small, square slider from White Castle, according to Time. The influential burger debuted in 1921 and was the first to spawn a fast food empire.
The Time story — http://ti.me/1eWFs19 — puts the White Castle burger at the top of the list of the 17 most influential burgers of all time, beating out burgers from McDonald's and In-N-Out.
White Castle vice president Jamie Richardson tells The Columbus Dispatch that "slider" has been a term of endearment for the delectable little burgers since the 1950s.