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
usually sung by the tenor or baritone, except for an infrequent note or two to avoid awkward voice leading, in tags or codas, or when some appropriate embellishment can be created. One characteristic feature of barbershop harmony is the use of what is known as "snakes" and "swipes". This is when a chord is altered by a change in one or more non-melodic voices. Occasional passages may be sung by fewer than four voice parts.
Barbershop music is generally performed by either a barbershop quartet,
Barbershop music
Barbershop vocal harmony, as codified during the barbershop revival era (1930s–present), is a style of a cappella close harmony, or unaccompanied vocal music, characterized by consonant four-part chords for every melody note in a predominantly homophonic texture. Each of the four parts has its own role: generally, the lead sings the melody, the tenor harmonizes above the melody, the bass sings the lowest harmonizing notes, and the baritone completes the chord, usually below the lead. The melody is not