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Using a compilation of 25 studies from the literature, we investigate theevolution of the star-forming galaxy (SFG) Main Sequence (MS) in stellar massand star formation rate (SFR) out to $z \sim 6$. After converting allobservations to a common set of calibrations, we find a remarkable consensusamong MS observations ($\sim 0.1$ dex 1$\sigma$ interpublication scatter). Byfitting for time evolution of the MS in bins of constant mass, we deconvolvethe observed scatter about the MS within each observed redshift bins. Afteraccounting for observed scatter between different SFR indicators, we find thewidth of the MS distribution is $\sim 0.2$ dex and remains constant over cosmictime. Our best fits indicate the slope of the MS is likely time-dependent, withour best fit $\log\textrm{SFR}(M_*,t) = \left(0.84 \pm 0.02 - 0.026 \pm 0.003\times t\right) \log M_* - \left(6.51 \pm 0.24 - 0.11 \pm 0.03 \timest\right)$, with $t$ the age of the Universe in Gyr. We use our fits to createempirical evolutionary tracks in order to constrain MS galaxy star formationhistories (SFHs), finding that (1) the most accurate representations of MS SFHsare given by delayed-$\tau$ models, (2) the decline in fractional stellar massgrowth for a "typical" MS galaxy today is approximately linear for most of itslifetime, and (3) scatter about the MS can be generated by galaxies evolvingalong identical evolutionary tracks assuming an initial $1\sigma$ spread information times of $\sim 1.4$ Gyr.

A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6