Religion

intended to produce spiritual experiences. Spiritual does not mean supernatural, but specialized emotional states. Some religions claim that the practice itself creates the special states, so there is no need to believe in the teachings, just participate in the rituals.

Religions that don't have dogmas but could qualify under this definition include Buddhism, Taoism, ancestor worship, Unitarian Universalism, Reconstructionist Judiasm, shamanism and animism.

Other religions might have limited dogmas that have no direct ethical consequences or only progressive ones. Transcendalism might qualify. It's only belief seems to some type of pantheism, and adherents can draw their own conclusions from that, but they tended to be progressive, since oppressing someone else is like oppressing God.