efficiency.

"Safety is essentially an advertising and selling proposition,"

justice.

If workers were shown safer methods, accident records would improve without expensive new capital investment.

While nearly all accidents could be explained by any of several faults, certain explanations were favored at the expense of others.

rhetorical closure, problems

Success in such historical investigations requires not merely looking back from where we stand today at the actors of times past, but getting back to them, so we can stand next to them and adopt their perspective.

Applied to traffic problems, the loss of street capacity to curb-parked cars became "the parking evil."

proposed that street uses that impeded automobiles were misuses of the street.