How was wabash different from the earlier cases of munn and peik?

Wabash, St. Louis & Pacific Railway Co. v. Illinois (1886) differed from earlier cases like Munn v. Illinois (1877) and Peik v. Chicago & North Western Railway Co. (1876) in its emphasis on interstate commerce. While Munn and Peik upheld state regulation of businesses affecting public interest, Wabash ruled that states could not regulate interstate railroads, asserting that such authority belonged to the federal government. This marked a shift towards recognizing the limitations of state power in matters of interstate commerce.