I think this beast is the United Nations. There are 192 countries in the world and 190 have signed on to the U.N. charter (including the U.S.) Signing this charter gives the U.N. functional authority over the participating country at the descretion of the U.N. The charter is available on the internet. This voluntarily places nearly the entire world under the headship of the U.N. The U.N. began just after WW1 as the League of Nations. it tried to get all the countries of the world to sing on in the name of peace. The ouybreat of WW2 'killed' this idea (Rev.13 v14 'wounded by the sword' the sword represents war )and it appeared to be dead,but, after WW2 a U.S. government branch called the C.F.R. and some U.K. officials got the idea of the U.N. and the beast which was wounded by the sword was revived. The U.S. and the U.K. are the False Prophet(remember the two horns) of Revelation they (at least try to)make countries obey the beast. Whenever a U.N. member country does not behave correctly these two countries bring the deliquent country back in line. The Roman church and the pope form, I think, part of the future antichrist religon or, as scripture calls it, Babylon as well as part of the Great City called Babylon.
Matthew Henry is not entirely accurate on his commentary. The beast of the sea is the Roman Catholic Church/Vatican and her teachings, and the beast out of the earth is the U.S. Think about it using what rev. says. The beast of the sea recieves a deadly wound,(In 1798 General Berthier made his entrance into Rome, abolished the papal government, and established a secular one)around the same time as the U.S. emerged as a new Nation. A beast is defined as a nation is prophesy, and sea represents a populated area, and the earth represents a relatively remote area. Does this match all the following?