Answer:
Cell phones and lighting
Explanation:
Cell phones allow everyone to be connected with one another,
and lighting allows people to work more then eight hours a day. Before electricity people were only able to work while the sun was out. It also allows us to produce goods faster and of higher quality.
Concerning contemporary cases about the establishment clause, the defining point in determining constitutionality in Van Orden v. Perry and McCreary County v. American Civil Liberties Union of Kentucky seems to be that of
secular versus religious purposes.
For nearly the first 100 years after the ratification of the Fourteenth Amendment, the Supreme Court interpreted the equal protection clause to
permit a system of segregated social facilities.
John Stuart mill believed in checks and balances
