  After a brief review of string and $M$-Theory we point out some deficiencies.
Partly to cure them, we present several arguments for ``$F$-Theory'', enlarging
spacetime to $(2, 10)$ signature, following the original suggestion of C. Vafa.
We introduce a suggestive Supersymmetric 27-plet of particles, associated to
the exceptional symmetric hermitian space $E_{6}/Spin^{c}(10)$. Several
possible future directions, including using projective rather than metric
geometry, are mentioned. We should emphasize that $F$-Theory is yet just a very
provisional attempt, lacking clear dynamical principles.
