It it through Jesus Christ that we know God loves us, and that we were given objective: to love God unconditionally, to build His kingdom on earth. They need priests to assist build their artificial tribe of civilisation, so that natural tribes don't aim for one another's throats. This is the warrior's conundrum: they want effective social expertise. Christianity grew to become this social expertise. The Christian empire started as early as king Alfred or Charlemagne, who encountered precisely the problem described above, HeartSense and solved it precisely with Christianity.