Keller had no language until, when she was seven, her teacher
Anne Sullivan
(who was herself near-blind) taught her to understand the word
water by linking the symbol for it with holding her hand under a water-pump. Keller went on to become a scholar of languages, to graduate from
Radcliffe College
, and eventually to visit countries all over the world as an ambassador for radical and feminist political causes, including those of
suffrage and birth control. The phenomenally popular autobiography may have played its part in keeping public interest focussed on her early struggles to the exclusion of her adult work.