what belief united the progressive movement

that society's problems could be solved
that education needed reform
that there should be a federal income tax
that political bosses should not hold office

The belief that united the progressive movement was that society's problems could be solved. This ideology emphasized the need for social and political reforms to address issues such as poverty, corruption, inequality, and labor exploitation. The movement advocated for measures such as education reform, breaking up monopolies, worker protection, women's suffrage, and government intervention in economic affairs to create a fairer and more just society. While some progressives supported other specific ideas like a federal income tax or opposing political bosses, the overarching belief in solving societal problems was what united them.