The Fugitive Slave Act was a law passed in 1850 that required the return of runaway slaves to their owners and imposed penalties on anyone who aided their escape. This act intensified the sectional conflict between the North and South, as it mandated cooperation in the capture of fugitive slaves, which many in the North found morally objectionable. It was a significant part of the Compromise of 1850 and ultimately contributed to the failure of these compromises to resolve tensions over slavery.