Question: What Portugese poet popularized the concept of the Fifth Empire?

Context paragraphs:
Rudolf Falb: Rudolf Falb (born April 14, 1838 in Obdach (Styria, Austrian Empire; died September 29, 1903 in Schöneberg, German Empire) was an Austrian popularizer of natural history who concerned himself with earthquakes, meteorology, astronomy and also with evolutionary linguistics.  He developed the "lunisolar flood hypothesis" of earthquakes and volcanism, based on the concept of subterranean lava tides, which the academic community thoroughly refuted even during his lifetime; nevertheless he attained considerable popularity through apparently correct predictions of several seismic events.  Falb's lasting legacy is that he popularized the concept of extraterrestrial influences of geophysical phenomena, even though his concepts regarding the origins of earthquakes were wrong.

The Fifth Empire: The Fifth Empire ("O Quinto Império - Ontem Como Hoje") is a 2004 Portuguese film directed by Manoel de Oliveira.

Fernando Pessoa: Fernando António Nogueira Pessoa (] ; June 13, 1888 – November 30, 1935), commonly known as Fernando Pessoa, was a Portuguese poet, writer, literary critic, translator, publisher and philosopher, described as one of the most significant literary figures of the 20th century and one of the greatest poets in the Portuguese language.  He also wrote in and translated from English and French.

Competence (human resources): Competence is the ability of an individual to do a job properly.  A competency is a set of defined behaviors that provide a structured guide enabling the identification, evaluation and development of the behaviors in individual employees.  The term "competence" first appeared in an article authored by R.W. White in 1959 as a concept for performance motivation.  In 1970, Craig C. Lundberg defined the concept in "Planning the Executive Development Program".  The term gained traction when in 1973, David McClelland wrote a seminal paper entitled, "Testing for Competence Rather Than for Intelligence".  It has since been popularized by Richard Boyatzis and many others, such as T.F. Gilbert (1978) who used the concept in relationship to performance improvement.  Its use varies widely, which leads to considerable misunderstanding.

Sebastianism: Sebastianism (Portuguese: sebastianismo ) is a Portuguese messianic myth, based on the belief that King Sebastian of Portugal, disappeared in the battle of Alcácer Quibir, will return to save Portugal.  The belief gained momentum after an interpretation by priest António Vieira of Daniel 2 and the Book of Revelation that foreshowed a Portuguese Fifth Empire.  In Brazil the most important manifestation of Sebastianism took place in the context of the Proclamation of the Republic, when movements emerged that defended a return to the monarchy.  It is categorised as an example of the King in the mountain folk motif, typified by people waiting for a hero to return to save them.  The Portuguese author Fernando Pessoa wrote about such an hero in his epic "Mensagem" ("The Message").

African Renaissance: The African Renaissance is the concept that African people and nations shall overcome the current challenges confronting the continent and achieve cultural, scientific, and economic renewal.  The African Renaissance concept was first articulated by Cheikh Anta Diop in a series of essays beginning in 1946, which are collected in his book "Towards the African Renaissance: Essays in Culture and Development, 1946-1960".  This concept has been further popularized by former South African President Thabo Mbeki during his term of office, heralding the beginning of The African Renaissance, and it continues to be a key part of the post-apartheid intellectual agenda.  It has found new expression and momentum within the International Decade for People of African Descent through the Door of Return initiative which is coming out of the historical Maroon community of Accompong Jamaica in cooperation with Nigeria, Ghana and Zimbabwe.  The revival is being lead by Accompong Finance Minister Timothy E. McPherson Jr. and Nigeria's Senior Special Assistant to the President on Diaspora and Foreign Affairs, Hon. Abike Dabiri.

Lamborghini Countach: The Lamborghini Countach is a rear mid-engined, V12 sports car produced by Italian car manufacturer Lamborghini from 1974 to 1990.  Its design pioneered and popularized the wedge-shaped, sharply angled look popular in many high-performance sports cars.  It also popularized the "cab forward" design concept, which pushes the passenger compartment forward to accommodate a larger rear-mounted engine.

Fifth Empire: The Fifth Empire (Portuguese: "Quinto Império") is a concept of a global Portuguese empire with spiritual and temporal power, based on an interpretation of Daniel 2 and the Book of Revelation, whose origins lay with António Vieira.  The concept became well known after the publication of the book "Mensagem", by Fernando Pessoa.

Black Girl Magic: Black Girl Magic (#BlackGirlMagic) is a concept and movement that was popularized by CaShawn Thompson in 2013.  The concept was born as a way to "celebrate the beauty, power and resilience of black women," as described by Julee Wilson from The Huffington Post, and to congratulate black women on their accomplishments.  Referring to a speech made by Michelle Obama at the Black Girls Rock Awards, Thompson explains that black women around the world persevering despite the adversity inspired her to spread the concept of Black Girl Magic.  With these women in mind, Thompson created the social media hashtag, clothing campaign, and rallying cry "Black Girl Magic", in the hopes of counteracting negativity society places on black women.

Post-network era: The post-network era, also known as the post-era era, is a concept that was popularized by Amanda D. Lotz.  It denotes the period that followed an earlier network era, television's first institutional phase that started in the 1950s and ran through to the mid-1980s, and television's later multi-channel transition.  It describes a period that saw the deterioration of the dominance of the Big Three television networks: ABC, CBS and NBC, and follows the creation of a wide variety of cable television channels that catered specifically to niche groups.  The post-network era saw the development of technologies that deliver a wider diversity of programming choice, less constraints on a consumers choice of medium, decentralization of the location of their viewing, and freedom of choice over time of their viewing.  For Amanda D. Lotz, the post-network era has been defined by five C's: "choice, control, convenience, customization, and community".  These five concepts, which have defined the post-network era, all relate to the ways in which viewers have greater access to a wider array of content which can be consumed on their own terms.  The concept comes from the field of Television studies, and has been used by various academics to discuss numerous different topics.  The concept has been endorsed by media scholar Henry Jenkins, co-director of the Media Industries Project Michael Curtin, and American Studies, and Film and Media professor Jason Mittell.

Supporting paragraphs: Fifth Empire Fernando Pessoa
Answer: Fernando António Nogueira Pessoa