This week is the last of the Adoptionism heresies.
Christadelphianism is the name for a 19th-21st century heretical church that follows Unitarianism (making it both antitrinitarian and a Pelagianism-family heresy). They now have churches in 120 countries, but a relatively small membership worldwide. They believe in rebaptism through total immersion and pacifism (Anabaptism), and they deny the Trinity (believing instead in God the Father only). They claim all their teachings are from the inerrant Bible. They believe in Jesus, but as a Father-created being, not eternal God. They believe there is no security in salvation, and that you must keep trying to live a perfect life your whole life. You will not know if you were “good enough” until the Second Coming when all mankind finds out where they spend the rest of eternity—in Hell, or on a new, transformed earth with God (they do not believe in Heaven). The Nazarenes we know today started out as Christadelphians, but separated in the late 19th century.