People are becoming dumber and dumber, according to a controversial study, and that fits the teachings of the Bible, according to an advertisement released by a Creationist group.

"You know, our world is so technologically advanced that we often think we are far more intelligent that our ancestors," Ken Ham of Answers in Genesis says in the 60-second ad, which was uploaded to YouTube on Thursday. "In fact, many people think ancient cultures were primitive, but a recent study found that human intelligence may actually be declining."

Dr. Gerald Crabtree of Stanford University published an article in 2012 that argued humans were gradually losing their cognitive capabilities.

"You see, this is consistent with a biblical view of creation," Ham said. "The Bible tells us that humans were highly intelligent from the beginning. How do we know? Well, Adam named many animals in a single day, and people before the Flood had musical instruments and were able to construct the Ark. It makes sense that Adam's brain was probably much more capable than any modern human. Man has degenerated because of sin. It corrupted God's very good creation."

Crabtree, however, had a much different hypothesis. He argued that human intelligence was declining because adverse genetic mutations were not being weeded out by evolutionary pressures thanks to modern society and technology.

The leading geneticist said the peak of human intelligence probably occurred 50,000 to 500,000 years ago, before our ancient ancestors left Africa. Ham believes the universe is only about 6,000 years old.

Listen to the ad below.

[Caveman in bear skin via Shutterstock]