What do the provisions of the Federal Food and Drugs Act of 1906 suggest
about how the historical context changed between the 19th and 20th
centuries?

the two colonies had the earliest laws mandating religious tolerance.

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.

no one really purchased it themselves, it was all america, they had debates etc.