Marjorie Merriweather Post is most often mentioned today as the person who built Mar-a-Lago. But she was a unique figure as a woman who helmed a huge corporation when she was still in her 20s in the early 20th century.
Research:

Elizabeth Fulhame’s Colorful Chemistry
36:18

Richard Peters and Early Atlanta History
38:07

SYMHC Classics: Nelson Pill Hearings
38:25