  In the Color Glass Condensate (CGC) effective field theory, colliding sheets
of Colored Glass form a strongly interacting, non-equilibrium state called the
Glasma. How Colored Glass shatters to form the Glasma, the properties of the
Glasma, and how the Glasma thermalizes into a Quark Gluon Plasma(QGP) are
questions of central interest in understanding the properties of the strongly
interacting matter produced in heavy ion collisions. We argue that these
questions can be addressed in the framework of field theories with strong time
dependent external sources. Albeit such field theories are non-perturbative for
arbitrarily weak coupling, moments of the multiplicity distribution can be
computed systematically in powers of the coupling constant. We demonstrate that
the average multiplicity can be (straightforwardly) computed to leading order
in the coupling and (remarkably) to next-to-leading order as well. We relate
our formalism to results from previous 2+1 and 3+1 dimensional numerical
simulations of the Glasma fields. The expanding Glasma is unstable; small
fluctuations in the initial conditions grow exponentially with the square root
of the proper time. Whether this explosive growth leads to early thermalization
in heavy ion collisions requires at present a better understanding of these
fluctuations on the light cone. In the final lecture, motivated by recent work
of Bialas and Jezabek, we discuss the widely observed phenomenon of limiting
fragmentation in the CGC framework.
