The mid-19th-century scholar Ferdinand Baur suggested that the author of Acts had re-written history to present a united Peter and Paul and advance a single orthodoxy against the Marcionites. (Marcion was a 2nd-century heretic who wished to cut Christianity off entirely from the Jews). Baur continues to have enormous influence, but today there is less interest in determining the author of Acts' historical accuracy (although this has never died out) than in understanding his theological program.[30]