Sense’s new lead scientist is just getting his hands on two years of user sleep data, and he seems particularly passionate about using it for good, reports The Washington Post.

Matthew Walker, a professor of neuroscience and psychology at the University of California in Berkeley, and director of the U.C. Berkeley Sleep and Neuroimaging Laboratory, does not mince words when it comes to snoozing.

“It’s very clear right now that the sleep-loss epidemic is the greatest public health crisis in First World nations of the 21st century,” Walker told The Washington Post. “Every disease that is killing us, in First World countries, can be linked to loss of sleep.”