And the first of the two Bushes elected to the White House has also seen his image improve, Berkowitz said.
"When he was defeated in 1992, his legacy looks unclear. Now he seems like this compassionate guy and his image improved during his son's presidency," he said.
Libraries also make the president look good
Ever since President Franklin Delano Roosevelt donated his personal and presidential papers to the federal government in 1939, the tradition of the presidential library has blossomed.
Part library, part museum, part tribute, each presidential library is a testament to the time each former president spent in the White House. And according to Thurber, libraries help rehabilitate a presidential image.
"These libraries, I think, are bias," Thurber said. "They want to protect the history, but they also want to make the president look good."
One of Thurber's examples: "If you go to the Truman library, there is only one small newspaper article that describes the fact that he was the one who decided to use the atomic bomb. That is probably the most important thing in his administration and it is sort of hidden. He and those protecting his image don't want that to be the major thing."
So far, there are 13 official presidential libraries in the United States with a handful that are not recognized by National Archives.
Nichols echoed Thurber by saying "the presidential library undoubtedly helps."
The reason: the public tends to be more forgiving when they see the accomplishments of a presidency laid out in front of them.
"Historians just love to tell good stories," Nichols said. "Outside of Hitler and a few other people, historians hate to make people just sound awful."
He concluded: "It is almost in the interest of people in my profession to find good things about people and underline and them."