Identifying hard and soft sweeps has been basically a solved problem for almost 15 years. This is because loci drifting (a) in the population have very different frequency histories than loci being swept to fixation (b). However, selection on complex, quantitative traits does not leave signatures of sweeps. When selecting quantitative traits, the trait changes rapidly, but this is due to hundreds or thousands of loci having small changes in allele frequency (c).