YOU SAID:

This is the worst thing ever made by a human.

INTO JAPANESE

これは、人間史上最悪の事態です。

BACK INTO ENGLISH

This is the worst thing in human history.

INTO JAPANESE

これは、人類の歴史で最悪のものです。

BACK INTO ENGLISH

This is one of the worst in the history of mankind.

INTO JAPANESE

これは人類の歴史の中で最悪の一つです。

BACK INTO ENGLISH

This is one of the worst in the history of mankind.