  A meta-analysis is performed of the literature on evolution in cosmic
star-formation rate density from redshift unity to the present day. The
measurements are extremely diverse, including radio, infrared, and ultraviolet
broad-band photometric indicators, and visible and near-ultraviolet
line-emission indicators. Although there is large scatter among indicators at
any given redshift, virtually all studies find a significant decrease from
redshift unity to the present day. This is the most heterogeneously confirmed
result in the study of galaxy evolution. When comoving star-formation rate
density is treated as being proportional to $(1+z)^{\beta}$, the meta-analysis
gives a best-fit exponent and conservative confidence interval of $\beta=
2.7\pm 0.7$ in a world model with $(\Omega_M,\Omega_{\Lambda})=(0.3,0.7)$ and
$\beta= 3.3\pm 0.8$ in $(\Omega_M,\Omega_{\Lambda})=(1.0,0.0)$. In either case
these evolutionary trends are strong enough that the bulk of the stellar mass
at the present day ought to be in old ($>6 \mathrm{Gyr}$) populations.
