Genesis 6:11-12
(יא) וַתִּשָּׁחֵת הָאָרֶץ לִפְנֵי הָאֱלֹהִים וַתִּמָּלֵא הָאָרֶץ חָמָס: יב) וַיַּרְא אֱלֹקִים אֶת הָאָרֶץ וְהִנֵּה נִשְׁחָתָה כִּי הִשְׁחִית כָּל בָּשָׂר אֶת דַּרְכּוֹ עַל הָאָרֶץ:
The earth became corrupt before God; the earth was filled with lawlessness. And God saw the earth, and, behold, it was corrupt; for all flesh had corrupted their way upon the earth. [Translation by mechon-mamre.org]

Suggested Discussion Questions:

We know about human sins, how does the earth become corrupted?

Time Period: Biblical (early ancestors to 165 BCE)