culprit

It’s not the electoral college, per se, that’s the culprit.

The results showed that precipitation, not temperature, was the main culprit of glacier fluctuation during around 4,500, of the past 6,000 years, or 76 percent of the time.

This time around, the culprit was a steep hill that the 74-year-old comedian misjudged.

Another big component of housing is supply — the lack of which economists tend to single out as the main culprit driving rents and home prices higher.

Of the world's biggest economies, China is a major culprit, but far from the only one.