According to Frederick Douglass, there "is not a man beneath the canopy of heaven" who does not know what?

that slavery is wrong for him.

Explanation:

Frederick Douglass was an American abolitionist, author, social reformer, statesman and public speaker, popularly known for his advocacy against slave trade or slavery. He was born in February at Talbot County, Maryland, United States of America.

Frederick was fortunate to escape slavery in Maryland and subsequently, he became the national leader in the abolitionist movement established in New York and Massachusetts with the sole intention or purpose of abolishing slavery before and during the American Revolutionary War.

According to Frederick Douglass, there "is not a man beneath the canopy of heaven" who does not know that slavery is wrong for him. This simply means that everyone in the universe is aware of the fact that slavery is wrong and should be abolished or put to an end.

earlier philosophers whose work influenced the enlightenment included bacon, descartes, locke, and spinoza. the major figures of the enlightenment included beccaria, diderot, hume, kant, montesquieu, rousseau, adam smith, and voltaire. it spread the ideas of the enlightenment across europe and beyond.

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.