Final answer:
MacGregor uses a quotation to engage the reader on the topic of time standardization due to railways, highlighting the shift from local time to the widespread adoption of Greenwich Mean Time and the establishment of standard time zones.
Step-by-step explanation:
In the passage discussing the impact of time standardization due to railways, MacGregor utilizes a quotation to engage the reader. The transformation of societal routines with the standardization of time is particularly exemplified by the adoption of Greenwich Mean Time (GMT) by railways, which later spread to become the basis for time zones across continents. Before this, local times varied across cities and posed challenges for scheduling, prompting the need for a uniform system, especially for railroads and telegraphs which required synchronization across long distances.
In the United States, this led to the creation of four standard time zones in 1883. This standardization of time greatly facilitated interstate commerce and reduced confusion in transportation and communication. Innovations such as the chronometer and time clocks further supported the division of time into uniform segments, fundamentally altering the relationship between daily life and time.