  The 4MOST Cosmology Redshift Survey (CRS) will perform stringent cosmological
tests via spectroscopic clustering measurements that will complement the best
lensing, cosmic microwave background and other surveys in the southern
hemisphere. The combination of carefully selected samples of bright galaxies,
luminous red galaxies, emission-line galaxies and quasars, totalling about 8
million objects over the redshift range $z = 0.15$ to $3.5$, will allow
definitive tests of gravitational physics. Many key science questions will be
addressed by combining CRS spectra of these targets with data from current or
future facilities such as the Large Synoptic Survey Telescope, the Square
Kilometre Array and the Euclid mission.
