Today, I am recommending four essential works by prolific British science fiction author J.T. McIntosh (James Murdoch MacGregor). One in Three Hundred (1953/1954): With Earth facing an extinction level event, the spaceships that will ferry humanity to safety can only transport 1 in every 300 people.  Bill Easson, an evacuation arbiter in a small English town, must decide who goes and who stays behind. World Out of Mind (1953): An alien infiltrator rises through the ranks of a society obsessed with aptitude tests in preparation for a looming invasion.  But as he begins to understand and appreciate humanity, his loyalties begin to shift. Born Leader (1954): Two ships flee a doomed Earth and establish very different planetary colonies - one, an authoritarian society ruled by elders; the other, a libertarian society dominated by youth.  But the two must find a way to work together when faced with a threat from their long-dead homeworld. The Fittest (1955): An experiment to augment the intelligence of dogs, cats, rats, and mice spirals out of control when the test subjects escape to the English countryside and begin to turn the tables on humanity. Check out the quoted thread for the recommended works of Theodore Sturgeon, Alfred Bester, Bob Shaw, Clifford D. Simak, Algis Budrys, A.E. van Vogt, C.L. Moore, Cordwainer Smith, C.M. Kornbluth, D.G. Compton, Thomas M. Disch, Alice Bradley Sheldon (James Tiptree, Jr.), John Brunner, Judith Merril, Hal Clement, James Blish, Jack Williamson, Katherine MacLean, Fred Saberhagen, Jack Vance, Leigh Brackett, Edgar Pangborn, R.A. Lafferty, William Tenn, Kate Wilhelm, Avram Davidson, James H. Schmitz, Eric Frank Russell, Brian W. Aldiss, Carol Emshwiller, Wilson Tucker, Chad Oliver, Zenna Henderson, Pauline Ashwell, Frederik Pohl, Henry Kuttner, Barrington J. Bayley, James P. Hogan, C.J. Cherryh, Margaret St. Clair, Keith Laumer, Charles L. Harness, Howard Waldrop, Rosel George Brown, Gordon R. Dickson, Robert Sheckley, Fredric Brown, Kit Reed, Joanna Russ, H. Beam Piper, Daniel F. Galouye, Sydney J. Van Scyoc, Tom Godwin, Andre Norton, Harry Harrison, Vonda McIntyre, John Christopher, John Wyndham, Michael Bishop, Doris Piserchia, Bob Buckley, George Alec Effinger, Olaf Stapledon, John Varley, Miriam Allen deFord, Raymond F. Jones, Suzette Haden Elgin, Richard Cowper, Bruce Sterling, Josephine Saxton, Mack Reynolds, Phyllis Gotlieb, E.E. “Doc” Smith, Sterling E. Lanier, L. Sprague de Camp, Fritz Leiber, George Turner, Octavia E. Butler, Philip José Farmer, Somtow Sucharitkul, Charles Sheffield, Sonya Dorman, Clark Ashton Smith, Norman Spinrad, Naomi Mitchison, Suzy Mckee Charnas, Barry N. Malzberg, Paul Preuss, Lloyd Biggle Jr., George S. Schuyler, Damon Knight, Nancy Kress, E.C. Tubb, John Sladek, Joan D. Vinge, Ward Moore, Marta Randall, Robert L. Forward, Ian Watson, Brian Stabelford, Keith Roberts, David R. Bunch, Michael G. Coney, Frank M. Robinson, Christopher Priest, Vernor Vinge, Lee Hoffman, Wilmar H. Shiras, Lucius Shepard, David I. Masson, Mildred Clingerman, Leigh Kennedy, Ernest Hogan, Jack Womack, Kenneth Bulmer, Mark Clifton, Kage Baker, Murray Leinster, Evelyn E. Smith, Kris Neville, Edmond Hamilton, James White, Wyman Guin, Emil Petaja, John Boyd, Christopher Anvil, Alan E. Nourse, T.J. Bass, Colin Kapp, Edmund Cooper, Rog Phillips, Mark S. Geston, James E. Gunn, Walter Tevis, Maureen F. McHugh, John Crowley, George O. Smith, Cherry Wilder, F.L. Wallace, G.C. Edmondson, Stanley G. Weinbaum, Pamela Sargent, Robert F. Young, Fred Hoyle, Eleanor Arnason,  Bertram A. Chandler, Charles Eric Maine, Tanith Lee, and Kathleen Ann Goonan.