Former Liberian President Ellen Johnson Sirleaf made history when she became the world's first black woman elected president. She was also Africa's first elected female head of state - president of Liberia from 2006 to 2018. In 2011, the Harvard University graduate was one of three women to win the Nobel Peace prize. Alongside Leymah Gbowee and Tawakkol Karman, she was awarded the Nobel Peace prize for non-violent struggle for the safety of women and for women's rights to full participation in peace-building work. In 2018, Ellen Johnson Sirleaf became the first woman to be awarded the Mo Ibrahim Prize for African leadership. The much coveted Mo Ibrahim Prize is a US$5 million award paid over ten years and US$200,000 annually for life thereafter.