  The universe is things which change and called events. The events are matter
and field. A boundary divides a system to things and environment. The things
belong to the environment have no significant effect on the things belong to
the system. The physical observables are the variations of things and it is
always assumed that the conscious thing is placed in environment because the
science cannot explain consciousness. There is not only an obligated minimum
boundary between things (space) but also between past and future (present). The
gravitational field has significant effect on these obligated minimums,
especially at Planck scale. By using the above concept we introduce a grand
unified reaction platform for categorizing the current physical paradigms and
possible future explanation of the universe as a whole.
