Some historians believe that the accusations against Hiss were accurate and that he was in fact a Soviet spy. They point to the evidence presented by Chambers, including documents that Chambers claimed had been given to him by Hiss. They also note that Hiss's close association with known Communists and his refusal to cooperate fully with the FBI during his investigation are consistent with the behavior of a spy.
Other historians believe that the accusations against Hiss were false and that he was the victim of a political vendetta. They point to the fact that Chambers's testimony was often contradictory and that no definitive evidence was ever presented to prove that Hiss had actually passed classified information to the Soviets. They also note that Hiss was a loyal and dedicated government employee with a long history of service to his country.
Ultimately, the question of Alger Hiss's guilt or innocence is a matter of historical debate. There is evidence to support both sides of the argument, and it is likely that the truth will never be known for certain.