Autentico Judaism was a branch of the ancient Jewish religion. While rejected by the most orthodox branches of Judaism to the point that some Jewish branches do not consider them to be legitimate Jews, the Autenticos have become the fastest-growing branch of Judaism by the 20th Century PD. They rejected the notion of a hereditary "chosen people" enshrined by their more orthodox and traditional brethren and considered that it was a self-selected body. Thus, Autentico Judaism practiced proselitism and conversion among non-Jews.