Spirituality, in my humble opinion, does not involve the concept of power. Therefore science and religion, with Religious Humanism now fused, represents spiritual domains.
Where does that leave the "science" of political science? Michael Walzer asks on BigThink.com whether the listener is going to interest himself in politics or political science.
This problem is similar to that of technology and basic science. There is weapon technology which is very power oriented. There is also political Islam.
Religious Humanism does not concern itself with power.