A Brief History of First Ladies and Their Causes

Lady Bird Johnson, 1963-1969
As testament to her environmental ardor, a grove of skyscraper-esque trees in Redwood National Park bears the name of Lady Bird Johnson. During her husband's time in office, she fully embraced nature, whether that meant planting thousands of tulips in Washington or sponsoring the Highway Beautification Act. At one point, the Secretary of the Interior noted that, "Mrs. Johnson has been a 'shadow' Secretary of the Interior for much of her life."

• Photos of Presidents and Their Children