Conversation so far:
What happened in 2005 for Wangari Maathai?
On 28 March 2005, Maathai was elected the first president of the African Union's Economic, Social and Cultural Council
What did Wangari Maathai accomplish as Presiden of the African Union's Economic, Social and Cultural Council?
was appointed a goodwill ambassador for an initiative aimed at protecting the Congo Basin Forest Ecosystem
Was the intiative by Wangari Maathai aimed at protecing the Congo Basin Forest Ecosystem successful?
What did Wangari Maathai do after her time on as President of the African Union's Economic Social and Cultural Council?
In June 2009, Maathai was named as one of PeaceByPeace.com's first peace heroes.

Question: What earned her that title?
Self-contained rewrite: What earned Wangari Maathai title of PeaceByPeace.com's first peace heroes?