What might happen if the constitution allowed state laws to have supremacy over federal laws?

If state law were to have the higher power than federal law then the state's would be able to go against laws set by Congress with no repercussions. For example: during the 1950s Congress passed a federal law to end segregation. Arkansas tried to implement their own state laws to continue segregation in school. Of course it didn't work as Federal Law always reigns superior but if it was the other way around Arkansas would've had their schools segregated and the federal law could do nothing. I hope that helps.

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !