YOU SAID:

I am the greatest person on the history of the earth

INTO JAPANESE

私は地球の歴史上最高の人物です

BACK INTO ENGLISH

I am the greatest person in the history of the earth

INTO JAPANESE

私は地球の歴史の中で最高の人です

BACK INTO ENGLISH

I am the best person in earth history

INTO JAPANESE

私は地球史上最高の人です

BACK INTO ENGLISH

I am the best person in earth history