Well it is dominant in that >300/~400 languages are bow in this family. This paper argues for a mid-holocene origin from a proto language around the time we are

Well it is dominant in that >300/~400 languages are bow in this family. This paper argues for a mid-holocene origin from a proto language around the time we are discussing, and also mentions some other theories w sources (https://langev.com/pdf/442ac40068c1d8a67a561d0d7f0fcd95c429c265.pdf https://langev.com/pdf/442ac40068c1d8a67a561d0d7f0fcd95c429c...)