There is perhaps no other concept in the whole field of governmental or constitutional jurisprudence today of more immediate practical significance than that of interstate commerce. In rather striking contrast with conditions of an earlier day, interstate commerce has come to be very closely related to everyday life in a great variety of ways. Regulations now imposed in the name of interstate commerce affect practically every mouthful of food we eat, every article of clothing we wear, everything we buy or sell as well as the fuel with which we cook our food or heat our homes, to mention only some of their more important ramifications.
Robert L. Howard,
Gas and Electricity in Interstate Commerce,
49 Bulletin Law Series.
Available at: http://scholarship.law.missouri.edu/ls/vol49/iss1/3