  We argue that the fundamental "atomic objects" in string theory are themelia:
extended objects that have 16 supersymmetries locally. We show that all
existing smooth horizonless microstate geometries can be seen as bound states
of themelia, and we conjecture that all such bound states with suitable KKM
charges will give rise to microstate geometries. We also construct the most
general themelion with a three-torus isometry and show that it interpolates
between superstrata and the super-maze.
