Answer: Practically everyone is biased in some way. ... Basically, bias means having an unfair or unbalanced opinion. Since history is a subject where people express their opinions it means that we have to be very careful to watch out for bias.
Explanation:
Gladiators were usually slaves, criminals, or prisoners of war—the Romans knew that the best way to orchestrate a fight to the death was to use men who have nothing to lose.
A. Gladiator
I do not know which states but the main countries are China, India, Egypt, Greece, Rome and Britain.