Do you know anything about Barbershop music?
Yes, it is a style of cappella close harmony music!
How far back can we trace it's origin?
Well, its emergence can be traced  back to during the barbershop revival era in 1930s–present
Wow amazing, which country did this originate from?
It has origins in western Europe, when Sweet Adelines quartets", was coined in association with the organization of that name at that time. 
Did any of the popular genre we have today evolve from Barbershop music ?
A cappella music can be observed to have been derived from it as it is specifically group or solo singing without similiar to barbershop music
Amazing, thanks for enlightening me about Barbershop music
Sure, remember that occasional passages may be sung by fewer than four voice parts! That is what is so unique about such music.