Stanford Encyclopedia of Philosophy:

“Margaret Fuller (1810–1850), one of the most important American feminists of her day, was a philosopher, journalist, and literary critic. She belonged to the New England intellectual community called the transcendentalists, who also included Ralph Waldo Emerson and Henry David Thoreau”.

“Central to both Margaret Fuller’s theory and practice of life was the cultivation of the self. The practice of “self-improvement” or “self-culture” was very widespread among middle-class white Americans of the time”.

Read More – https://plato.stanford.edu/entries/fuller-margaret/

Source: Margaret Fuller. , None. [Between 1840 and 1880] Photograph. https://www.loc.gov/item/2002712183/