Who were the major economists of the 20th century most identified with laissez-faire economics?

There are many economists of the 20th century who are
identified with laissez-faire economics since laissez-faire is the idea that is most
adhered to by classical economists.  Some of the more famous names who have been
particular advocates of laissez faire include Ludwig von Mises, Friedrich Hayek, and
Milton Friedman.

All of these men are well-known to
conservative economists.  They all strongly support the idea that the government should
stay out of the economy as much as possible.  Hayek, in fact, wrote a book entitled
The Road to Serfdom in which he warns that any serious moves away
from laissez-faire will lead to a move to socialism and ultimately to the destruction of
human liberty.

There are many other famous economists we
could name as supporters of laissez-faire, but these are three of the most
important.