Former National Security Adviser Zbigniew Brzezinski told MSNBC Wednesday that, although Egyptian President Hosni Mubarak's regime has come to an end, the United States cannot expect the country can be transformed overnight into a "really full-blown democracy."

egypt, riots,Brzezinski, who served under President Carter when the United States brokered the 1979 peace treaty between Egypt and Israel at Camp David, warned any U.S. pressure for immediate change could end up being counter-productive.

"The point we have to bear in mind more clearly, is that our wish has to have some relationship to reality," Brzezinski told Chris Matthews in an interview on "Hardball." "That is to say, we can't expect that regime to be transformed overnight into a really full-blown democracy."