The Gravitino Swampland Conjecture
  We extend the swampland from effective field theories (EFTs) inconsistent
with quantum gravity to EFTs inconsistent with quantum supergravity. This
enlarges the swampland to include EFTs that become inconsistent when the
gravitino is quantized. We propose the Gravitino Swampland Conjecture: the
gravitino sound speed must be non-vanishing in all EFTs that are low energy
limits of quantum supergravity. This seemingly simple statement has important
consequences for both theories and observations. The conjecture is consistent
with and supported by the KKLT and LVS scenarios for moduli stabilization in
string theory.
