I've heard it a hundred times. "Noah preached, so we preach." But is that what the bible indicates? To me the bible seems to suggest that it was never God's intention to allow anyone to survive aside from Noah and his family:
Gen 6: 17-18: I am going to bring floodwaters on the earth to destroy all life under the heavens, every creature that has the breath of life in it. Everything on earth will perish. But I will establish my covenant with you, and you will enter the arkâyou and your sons and your wife and your sons' wives with you.
Never a hint of God telling Noah in Genesis to go and try and save anyone.
The oft quoted passage Matthew 24:37-39 says (NASB):
"For the coming of the Son of Man will be just like the days of Noah. "For as in those days before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, and they did not understand until the flood came and took them all away; so will the coming of the Son of Man be.
This doesn't really suggest that they had a choice in the matter...rather it seems to suggest that they didn't know what hit them.
2 Peter 2:5 says,
if he did not spare the ancient world when he brought the flood on its ungodly people, but protected Noah, a preacher of righteousness, and seven others;
This is the big proof that Noah "preached". Still, in a literal sense, it says Noah was preacher of "righteousness", not of God's impending wrath.
It just seems that the constant assertions by the WTS/JWs that Noah went out preaching, in the manner that JWs do today, rests on some pretty flimsy/nonexistant scriptural support.