Question: Between Authors Mary McCarthy and Colum McCann, who is also a political activist?

Context paragraphs:
Colum McCann: Colum McCann (born 28 February 1965) is an Irish writer of literary fiction.  He was born in Dublin, Ireland and now lives in New York.  He is a Distinguished Professor of Creative Writing in the Master of Fine Arts program at Hunter College, New York with fellow novelists Peter Carey and Tea Obreht, and has visited many universities and colleges all over the world.

Mícheál Ó hAodha: Mícheál Ó hAodha was born in Galway, Ireland, the eldest of 11 children, Ó hAodha grew up between the west of Ireland and the north of England.  He is one of the last of a very small group of poets who write in both Irish and English.  His first collection, the bilingual “Survivor” Dúchas Dóchasach (2007) was introduced by National Book Award winner Colum McCann and illustrated by Irish-African artist Jean Hakizimana.  His collection "Slán le hÉireann (Coiscéim] 2012)" (A Farewell to Ireland: Migrant Poems) on the experiences of Irish construction workers in England received high praise in "Poetry Ireland" and other publications.

Mary McCarthy (author): Mary Therese McCarthy (June 21, 1912 – October 25, 1989) was an American novelist, critic and political activist.

PEN America: PEN America: A Journal for Writers and Readers is an annual literary journal that features fiction, poetry, conversation, criticism, and memoir.  It is published by PEN American Center in New York City.  Contributors include Yousef Al-Mohaimeed, Paul Auster, Michael Cunningham, Lydia Davis, Petina Gappah, Nikki Giovanni, Rawi Hage, Shahriar Mandanipour, Colum McCann, Michael Ondaatje, Marilynne Robinson, Salman Rushdie, Susan Sontag, John Edgar Wideman, and many others.

Le Conversazioni: Le Conversazioni is an anglophone literary festival organized by Italian film personalities Antonio Monda and Davide Azzolini, and financed by the Italian government and various corporations.  It is held on the island of Capri.  The festival was first held in 2006.  These gatherings have attracted a wide range of notable writers, including Martin Amis, Paul Auster, Chuck Palahniuk, Elizabeth Strout, Colum McCann, Donna Tartt, Nathan Englander, Nicole Krauss, EL Doctorow, Jeffrey Eugenides, Ian McEwan, Claire Messud, Annie Proulx, Stephen Sondheim, Michael Chabon, Wole Soyinka, Jamaica Kincaid, Jonathan Safran Foer, David Sedaris, Ian McEwan, Zadie Smith, Philip Gourevitch, David Foster Wallace, and others.

Dancer (novel): Dancer is a novel based on the life of Rudolf Nureyev, written by Colum McCann and published in 2003.

TransAtlantic (novel): TransAtlantic is a novel by Colum McCann, published in June 2013.

Zoli: Zoli is a novel by Colum McCann.  It follows the life of Marienka Novotna, nicknamed "Zoli", a Slovak Romani woman, from her childhood in the 1930s, through her exile in the 1950s, to her late adult life.  Although Zoli is a fictional character, her life is loosely based on that of the Polish Romani poet Papusza (Bronisława Wajs).

Jeffrey Rotter: Jeffrey Rotter is a writer.  He has written for numerous publications, including "The New York Times", "Spin magazine", ESPN, "McSweeney’s", "The Literary Review" and "The New York Observer".  In 2006 he completed his MFA in fiction at Hunter College, where he studied under Peter Carey, Colson Whitehead, Colum McCann, and Andrew Sean Greer.  At Hunter he was awarded a Hertog Fellowship to perform research for Jennifer Egan.  A longtime Brooklyn resident, he lives with his wife and their small boy, Felix.

Let the Great World Spin: Let the Great World Spin is a novel by Colum McCann set in New York City in the United States.  The book won the 2009 U.S. National Book Award for Fiction and the 2011 International IMPAC Dublin Literary Award, one of the most lucrative literary prizes in the world.  Its title comes from the poem "Locksley Hall" by Alfred, Lord Tennyson.

Supporting paragraphs: Mary McCarthy (author) Colum McCann
Answer: Mary Therese McCarthy