  The paper discusses the possibility of a universe that is not electrically
neutral but has a net positive charge. It is claimed that such a universe
contains a homogeneous distribution of protons that are not bound to galaxies
and fill up the intergalactic space. This proton `gas' charges macroscopic
objects like stars and planets, but it does not generate electrostatic or
magnetic fields that affect the motion of these bodies significantly. However,
the proton gas may contribute significantly to the total dark matter of the
universe and its electrostatic potential may contribute to the dark energy and
to the expansion of the universe.
