Laurentius Petrus Dignus "Lou" van den Dries (born May 26, 1951)[1] is a Dutch mathematician working in model theory.

Van den Dries was an invited speaker at the International Congress of Mathematicians in 1990 and 2018, and delivered the Tarski Lectures at the University of California, Berkeley in 2017.

An unfortunate byproduct of the computer revolution is that it has given new tools in the hands of unwise rulers to annoy us for no good reason.

Rather than go meekly along, we should vigorously protest and resist whenever demeaning schemes like ethics training rear their ugly head.

Van den Dries was the first state employee to be fined by the Illinois Executive Ethics Commission for failing to complete the mandatory training.