The progressive ideals evident in his speeches are morality, efficiency and democracy
Wilson was heavily influenced by progressive thoughts. His fourteen points speech is regarded by scholars as a a genuine and explicit demonstration of progressive thoughts and the subsequent change of tone for entry into the war was actually influenced by this translation.
In my view the period that has had the biggest impact on the development of US society is The Great Depression. That depression brought a huge economic growth but also changed mass culture that swept many Americans into consumer society.