Interesting article written in January 2020 from the Centre for the Future of Democracy at the University of Cambridge
Global Satisfaction with Democracy 2020
https://www.bennettinstitute.cam.ac.uk/media/uploads/files/DemocracyReport2020.pdf
Thomas Aquinas is credited as one of the greatest proponents of natural law. During his time in Cologne he was taught by Albertus Magnus. Magnus used the teachings of Aristotle in his mentorship of Thomas Aquinas.