Come now... IPAs have been around as long as beer has been brewed. !
Hmmmmm. Mike, do you think I look like the forum fact checker?
You've missed by at least 10,000 years!
My life study is proving beer was brewed before bread was made. Beer was why "we" became sedentary and grew crops.The first documented hop cultivation was in 736, in the Hallertau region of present-day Germany, although the first mention of the use of hops in brewing in that country was 1079
Its able to be brewed using airborne yeast ie accidentally.