Progressivism has not been harmful for the society and has been very beneficial.
Explanation:
At its core, Progressivism is movement towards commitment to social reform and ensuring social responsibility and equality among the people of the nation.
It has become one of the central issues in the country since the 1970s when the inordinate finally began to find a voice in the country.
This has led to some conservatives see it as moral decadence but it is only a challenge to their narrow idea of the country as it should be that does not reflect in its constitution.
In a way the movement is a way of redeeming and completing the ideas of the nation's foundation.
The answer that you're seeking is, "Trains from different rail lines could use each other’s tracks." The standardization of rails allowed trains to use eachothers tracks and increase speed and efficieny in deliveries. Hope I helped!
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