Based on the documents, one could argue that the Great Society programs were highly effective in addressing the social, economic, and political problems of the 1960's.
For example, Document 1 shows that since Lyndon B. Johnson took over president (in 1963) the number of poor persons and poverty rate both decreased steadily during this era. This shows that Lyndon B Johnson was on the right track in terms of solving the issue of poverty, which he references in Document 2.
He also helps from a political standpoint, as he helps to get the Voting Rights Act of 1965. His work with individuals like Dr. Martin Luther King Jr. (shown in Document 3) lead to a federal law that outlawed poll taxes, grandfather clauses, and other obstacles blacks faced when trying to vote.