Her ability to overcome personal challenges like her own insecurities was crucial. Also, her influence on FDR's policies during his presidency, especially regarding social welfare, was very important. And her work at the United Nations for international human rights cannot be overlooked.
The most important aspects include her fight for equality. She was constantly striving for equal rights for all, whether it was gender equality or racial equality. Her transformation of the First Lady role from a traditional one to an active, politically engaged one was also a major part of her life story. Additionally, her influence in international relations through her human rights work was of great significance.
One important aspect is her role as First Lady. She redefined it by being actively involved in social issues. Another is her work for human rights. She was a pioneer in this area.