Papa Test answers this question by providing his own list of presidents who are worthy of consideration, with the exception of the late Franklin D. Roosevelt, who never took office.
President Roosevelt, whose name is not mentioned, is considered by many to be the most influential, with an impressive record in business, diplomacy and public service.
He was one of the few presidents who did not have to be a Democrat in order to govern.
He became president for a time, but in December 1941 he resigned amid allegations of corruption.
Papa Test’s list also includes four former presidents, including Theodore Roosevelt and Woodrow Wilson.
Roosevelt died in December 1945.
Wilson was assassinated in April 1946, and the assassination of President John F. Kennedy in November 1963 is considered one of his most significant.
Theodore Roosevelt was the first president who served in the White House during the Great Depression.
He served as vice president from 1946 to 1953 and as president from 1953 to 1961.
Wilson was the only president to have been president in both World Wars.
Wilson is remembered as a tough and effective leader who brought the U.S. to its knees during World War II.
His presidency ended in 1963 with the assassination attempt of President Lyndon Johnson.
Wilson, a Democrat, is remembered for being an effective president, particularly in handling the aftermath of the Vietnam War.
John F. Kerry, the first secretary of state, was elected president in 2004.
He is remembered widely for his tough, diplomatic style and his ability to bring the country together.
Former President Jimmy Carter, a Republican, served as president for two terms from 1976 to 1977.
He left office in January 1979, after he and President Gerald Ford met for the first time.
Carter, a former U.N. ambassador, is credited with being one of America’s most effective presidents, and he has been remembered for his strong diplomacy.
Hillary Clinton, the Democratic presidential candidate, is one of only three former presidents in the modern era who have not served in office for more than two terms.
She is remembered with a heavy heart for her work in the Senate and as a longtime advocate for women.
Clinton served as secretary of State from 2009 to 2013.
He and former President Bill Clinton were both former Democrats.
In a nod to Clinton’s legacy, Papa’s list includes former presidents Franklin D., Harry Truman and Dwight Eisenhower.
“Papa’s list is filled with presidents who came to power with very positive expectations and who accomplished what they set out to do,” said John C. Hickenlooper, a University of Colorado history professor.
But he said Papa is not one of them.
For example, while FDR is considered the most popular president of the 20th century, Papas list of firsts includes the first woman president, an African-American president, the longest-serving president, a female military leader and a first lady who is married to a U.K. prime minister.
And while Roosevelt and Wilson were the two most popular presidents in terms of party affiliation, Papayas list also contains many Republicans who were more conservative.
Although Papa says he is not a political scientist, his list suggests that the country has changed significantly in the past 150 years.
He cites an increase in income inequality, a declining percentage of people earning enough to eat, and more people being diagnosed with chronic diseases, including diabetes, heart disease and cancer.
He also believes the United States is entering a period of profound political and social change, and that the time has come to recognize that change.
When he was asked to provide a list of possible presidents for future presidents, Papal Test said he would not be surprised if his list included Roosevelt, Wilson and Eisenhower.
“I don’t think the world would have been quite as much changed by then as it is,” Papa said.
“But I would be surprised to find out that this list doesn’t include the next three presidents.”
The Associated Press contributed to this report.