Black history

The "master-culture" of white slave owners made efforts to wipe out any African culture, there were those that continued to resist and defy the white culture. Slaves continued to keep to their ancestral roots in many expressive, but secret ways such as storytelling, music, and dance. This history was not mainstream for many years due to any harsh punishments administered by white slave owners. One woman's tongue was cut out as punishment for telling stories. These type of harsh actions provided strong incentive to keep silent and oppressed for many years. It was almost impossible to express black culture when white culture violently struck down any sort of expression. Why would black history be heavily suppressed by whites? Have cultures throughout history tried to suppress one another? Is history truly written by the winner?