Authenticity in Fusion Music

Indigenous peoples of Brazil have come to faith in Christ in large numbers in recent decades. As Christianity takes root in each culture, it may incorporate expressive forms of music and art, which can range from those identical to earlier cultural forms to those which are fully imported. But what happens when musicians and artists of a local indigenous community fuse elements from a variety of genres and create their own music? Are they just imitations of external forms? Or are they authentic c