Notions of race and racism have often played central roles in ethnic conflicts. Throughout history, when an adversary is identified as "other" based on notions of race or ethnicity (in particular when "other" is interpreted to mean "inferior"), the means employed by the self-presumed "superior" party to appropriate territory, human chattel, or material wealth often have been more ruthless, more brutal, and less constrained by moral or ethical considerations. According to historian Daniel Richter, Pontiac's Rebellion saw the emergence on both sides of the conflict of "the novel idea that all Native people were 'Indians,' that all Euro-Americans were 'Whites,' and that all on one side must unite to destroy the other". Basil Davidson states in his documentary, "Africa: Different but Equal", that racism, in fact, only just recently surfaced as late as the 19th century, due to the need for a justification for slavery in the Americas.