no. greek people have existed, a greek state was a new creation specifically in the mould of 19th century european nationalism. the only thing they’d actually be guilty of on this chart is the internal genocide of minorities that is part-and-parcel to the national project.

in any case there’s no political lineage and barely even a linguistic relationship from what i’m assuming your ancient events are, and the modern state. transcontinental african slave trade =/= someone being in a state of slavery on the african continent at any time in the past.

sorry to be a pedant but the “slavery was in africa before” is a popular mystification from racists trying to equivocate the modern european crimes.