Loren Eiseley (September 3, 1907 – July 9, 1977) was an American anthropologist, educator, philosopher, and natural science writer, who taught and published books from the 1950s through the 1970s. He received many honorary degrees and was a fellow of multiple professional societies. At his death, he was Benjamin Franklin Professor of Anthropology and History of Science at the University of Pennsylvania.

He was a "scholar and writer of imagination and grace," whose reputation and accomplishments extended far beyond the campus where he taught for 30 years. Publishers Weekly referred to him as "the modern Thoreau." The broad scope of his writing reflected upon such topics as the mind of Sir Francis Bacon, the prehistoric origins of humanity, and the contributions of Charles Darwin.

Eiseley's reputation was established primarily through his books, including The Immense Journey (1957), Darwin's Century (1958), The Unexpected Universe (1969), The Night Country (1971), and his memoir, All the Strange Hours (1975). Science author Orville Prescott praised him as a scientist who "can write with poetic sensibility and with a fine sense of wonder and of reverence before the mysteries of life and nature." Naturalist author Mary Ellen Pitts saw his combination of literary and nature writings as his "quest, not simply for bringing together science and literature ... but a continuation of what the 18th and 19th century British naturalists and Thoreau had done." In praise of "The Unexpected Universe", Ray Bradbury remarked, "[Eiseley] is every writer's writer, and every human's human ... One of us, yet most uncommon ..."

According to his obituary in The New York Times, the feeling and philosophical motivation of the entire body of Eiseley's work was best expressed in one of his essays, The Enchanted Glass: "The anthropologist wrote of the need for the contemplative naturalist, a man who, in a less frenzied era, had time to observe, to speculate, and to dream."Blum, Howard. Loren Eiseley, Anthropologist, 69; Eloquent Writer on Man and Nature, New York Times, (Obituary) July 11, 1977. Shortly before his death he received an award from the Boston Museum of Science for his "outstanding contribution to the public understanding of science" and another from the U.S. Humane Society for his "significant contribution for the improvement of life and environment in this country."

Early life Born in Lincoln, Nebraska, Eiseley lived his childhood with a hardworking father and deaf mother who may have suffered from mental illness. Their home was located on the outskirts of town where, as author Naomi Brill writes, it was "removed from the people and the community from which they felt set apart through poverty and family misfortune."Brill, Naomi. Loren Eiseley Society (LES) His autobiography, All the Strange Hours, begins with his "childhood experiences as a sickly afterthought, weighed down by the loveless union of his parents."

His father, Clyde, was a hardware salesman who worked long hours for little pay, writes Brill. However, as an amateur Shakespearean actor, he was able to give his son a "love for beautiful language and writing." His mother, Daisey Corey, was a self-taught prairie artist who was considered a beautiful woman. She lost her hearing as a child and sometimes exhibited irrational and destructive behavior. This left Eiseley feeling distant from her and may have contributed to his parents' unhappy marriage.

Living at the edge of town, however, led to Eiseley's early interest in the natural world, to which he turned when being at home was too difficult. There, he would play in the caves and creek banks nearby.Minnesota State University EMuseum's Eiseley biography (Internet Archive of website defunct since 2011), Retrieved 2015-10-16 Fortunately, there were others who opened the door to a happier life. His half-brother, Leo, for instance, gave him a copy of Robinson Crusoe, with which he taught himself to read. Thereafter, he managed to find ways to get to the public library and became a voracious reader.

Eiseley later attended the Lincoln Public Schools; in high school, he wrote that he wanted to be a nature writer. He would later describe the lands around Lincoln as "flat and grass-covered and smiling so serenely up at the sun that they seemed forever youthful, untouched by mind or time—a sunlit, timeless prairie over which nothing passed but antelope or wandering bird." But, disturbed by his home situation and the illness and recent death of his father, he dropped out of school and worked at menial jobs.

Eiseley enrolled in the University of Nebraska, where he wrote for the newly formed journal, Prairie Schooner, and went on archaeology digs for the school's natural history museum, Morrill Hall. In 1927, however, he was diagnosed with tuberculosis and left the university to move to the western desert, believing the drier air would improve his condition. While there, he soon became restless and unhappy, which led him to hoboing around the country by hopping on freight trains (as many did during the Great Depression).Eiseley, Loren. All the Strange Hours, (1975) Scribner Professor of religion, Richard Wentz, writes about this period:

Loren Eiseley had been a drifter in his youth. From the plains of Nebraska he had wandered across the American West. Sometimes sickly, at other times testing his strength with that curious band of roving exiles who searched the land above the rippling railroad ties, he explored his soul as he sought to touch the distant past. He became a naturalist and a bone hunter because something about the landscape had linked his mind to the birth and death of life itself.Wentz, Richard E., The American Spirituality of Loren Eiseley Christian Century, April 25, 1984,

Academic career Eiseley eventually returned to the University of Nebraska and received a B.A. degree in English and a B.S. degree in Geology/Anthropology. While at the university, he served as editor of the literary magazine Prairie Schooner, and published his poetry and short stories. Undergraduate expeditions to western Nebraska and the southwest to hunt for fossils and human artifacts provided the inspiration for much of his early work. He later noted that he came to anthropology from paleontology, preferring to leave human burial sites undisturbed unless destruction threatened them.

Eiseley received his Ph.D. degree from the University of Pennsylvania in 1937 and wrote his dissertation entitled "Three Indices of Quaternary Time and Their Bearing Upon Pre-History: a Critique", which launched his academic career. He began teaching at the University of Kansas that same year. During World War II, Eiseley taught anatomy to reservist pre-med students at Kansas.

In 1944, he left the University of Kansas to assume the role of head of the Department of Sociology and Anthropology at Oberlin College in Ohio. In 1947, he returned to the University of Pennsylvania to head its anthropology department. He was elected president of the American Institute of Human Paleontology in 1949. From 1959 to 1961, he was provost at the University of Pennsylvania; further, in 1961, the University of Pennsylvania created a special interdisciplinary professorial chair for him.

Eiseley was also a fellow of many distinguished professional societies, including the American Association for the Advancement of Science, the American Academy of Arts and Sciences, the National Institute of Arts and Letters and the American Philosophical Society.

At the time of his death in 1977, he was Benjamin Franklin Professor of Anthropology and History of Science, and the curator of the Early Man section at the University of Pennsylvania Museum.University of Pennsylvania Almanac, Loren Eiseley’s 100th Birthday Celebration at the Penn Museum October 30, 2007 He had received 36 honorary degrees over a period of twenty years, and was the most honored member of the University of Pennsylvania since Benjamin Franklin. In 1976, he won the Bradford Washburn Award of the Boston Museum of Science for his "outstanding contribution to the public understanding of science" and the Joseph Wood Krutch Medal from the Humane Society of the United States for his "significant contribution for the improvement of life and the environment in this country."

Books In addition to his scientific and academic work, Eiseley began in the mid-1940s to publish the essays which brought him to the attention of a wider audience. Anthropologist Pat Shipman writes,

the words that flowed from his pen ... the images and insights he revealed, the genius of the man as a writer, outweigh his social disability. The words were what kept him in various honored posts; the words were what caused the students to flock to his often aborted courses; the words were what earned him esteemed lectureships and prizes. His contemporaries failed to see the duality of the man, confusing the deep, wise voice of Eiseley's writings with his own personal voice. He was a natural fugitive, a fox at the wood's edge (in his own metaphor) ...Shipman, Pat. An Anthropologist With BiteNew York Times, August 19, 1990

Eiseley published works in a number of different genres including poetry, autobiography, history of science, biography, and nonfictional essays. In each piece of writing, he consistently used a poetic writing style. Eiseley's style mirrors what he called the concealed essay—a piece of writing that unites the personal dimension with more scientific thoughts.Wisner, William. "The Perilous Self: Loren Eiseley And The Reticence Of Autobiography." Sewanee Review 113.1, 2005 His writing was unique in that it could convey complex ideas about human origin and the relationship between humans and the natural world to a nonscientific audience. Robert G. Franke describes Eiseley's essays as theatrical and dramatic. He also notes the influence his father's hobby as an amateur Shakespearean actor may have had on Eiseley's writing, pointing out that his essays often contain dramatic elements that are usually present in plays.Franke, Robert. Journal of American Culture. "A Great Stage, A Great Play: The Theatrical And Tragic In Loren Eiseley's Essays.", 1995

In describing Eiseley's writing, Richard Wentz wrote, "As the works of any naturalist might, Eiseley's essays and poems deal with the flora and fauna of North America. They probe the concept of evolution, which consumed so much of his scholarly attention, examining the bones and shards, the arrowpoints and buried treasures. Every scientific observation leads to reflection."

In an interview on National Public Radio (NPR), author Michael Lind said,

Before the rise of a self-conscious intelligentsia, most educated people – as well as the unlettered majority – spent most of their time in the countryside or, if they lived in cities, were a few blocks away from farmland or wilderness ... At the risk of sounding countercultural, I suspect that thinkers who live in sealed, air-conditioned boxes and work by artificial light (I am one) are as unnatural as apes in cages at zoos. Naturalists like Eiseley in that sense are the most normal human beings to be found among intellectuals, because they spend a lot of time outdoors and know the names of the plants and animals they see ... For all of his scientific erudition, Eiseley has a poetic, even cinematic, imagination.Lind, Michael. NPR radio interview, October 17, 2006

Purposes of his writings