Progress

1. I would define "progress" as something that is constantly or inconstantly improving from the previous state without regressing. It is some action of improvement.

2. The Progressive Era is considered 1890-1920, because of the social, economic, and industrial changes in the US. It started as a social movement and turned political.

3. All Progressive Reforms are under providing the US with good education, safe environment and workplaces. They are common under making the US better as a whole.

4. Best to Worst:
Health and Medicine
Civil Rights
Government Reform
Conservation
Labor Reform
Socialism
Women's Rights
Temperance
Trust Busting
Radical Trade Unionism