From the White Wolf Wiki, the most complete White Wolf reference

If you are looking for the former Tradition from Mage: The Ascension, see Ahl-i-Batin.

The Subtle Ones are a legacy of mages that subtly influences mundane society toward a pattern of which they have previously conceived. Eventually, they learn gifts that allow them to blend into society instantaneously, and also to recognize the social climate merely by looking at such cues as billboards and fashion.