I notice old Dubya is right up there, the poll is a little suspect however as the majority seem to be recent presidents, Jackson and Taft don't appear.
Not only that, I think the poll grossly underrates the contribution Lyndon Johnson made to American society. Even though he served only one term, I think he was probably the most influential president of 20th century. Most of the legislation he passed is still in existence and had had a profound influence on American society.
Many of his laws, civil rights legislation, Medicare, Medicaid, war on poverty, the Great Society, he set up the National Endowment of Arts, major education funding in his Higher Education Act of 1965, funding of space program (the moon mission), his achievements are too numerous to mention.
Johnson achieved in one term what most presidents do not achieve in two terms. Even today the legislation that he passed is influencing American society in a profound way.
The problem is that his legacy was totally overshadowed by Vietnam War. But he accomplished a lot in his six yeras, more than Reagan, Bush, Clinton etc, ever hoped to achieve in their eight years.
I would easily classify Johnson as one of the greatest presidents in 20th century (Vietnam was notwithstanding). He profoundly affected American society and continues to do so even today.
