Our subjective inner life is what really matters to us as human beings--and yet we know relatively little about how it arises. Over a long and distinguished career Benjamin Libet has conducted experiments that have helped us see, in clear and concrete ways, how the brain produces conscious awareness. For the first time, Libet gives his own account of these experiments and their importance for our understanding of consciousness.

Most notably, Libet's experiments reveal a substantial delay--the "mind time" of the title--before any awareness affects how we view our mental activities. If all conscious awarenesses are preceded by unconscious processes, as Libet observes, we are forced to conclude that unconscious processes initiate our conscious experiences. Freely voluntary acts are found to be initiated unconsciously before an awareness of wanting to act--a discovery with profound ramifications for our understanding of free will.

How do the physical activities of billions of cerebral nerve cells give rise to an integrated conscious subjective awareness? How can the subjective mind affect or control voluntary actions? Libet considers these questions, as well as the implications of his discoveries for the nature of the soul, the identity of the person, and the relation of the non-physical subjective mind to the physical brain that produces it. Rendered in clear, accessible language, Libet's experiments and theories will allow interested amateurs and experts alike to share the experience of the extraordinary discoveries made in the practical study of consciousness.

Winner of the Runciman Award
Winner of the Charles J. Goodwin Award

“Tells the story of how the Seleucid Empire revolutionized chronology by picking a Year One and counting from there, rather than starting a new count, as other states did, each time a new monarch was crowned…Fascinating.”
—Harper’s

In the aftermath of Alexander the Great’s conquests, his successors, the Seleucid kings, ruled a vast territory stretching from Central Asia and Anatolia to the Persian Gulf. In 305 BCE, in a radical move to impose unity and regulate behavior, Seleucus I introduced a linear conception of time. Time would no longer restart with each new monarch. Instead, progressively numbered years—continuous and irreversible—became the de facto measure of historical duration. This new temporality, propagated throughout the empire and identical to the system we use today, changed how people did business, recorded events, and oriented themselves to the larger world.

Some rebellious subjects, eager to resurrect their pre-Hellenic past, rejected this new approach and created apocalyptic time frames, predicting the total end of history. In this magisterial work, Paul Kosmin shows how the Seleucid Empire’s invention of a new kind of time—and the rebellions against this worldview—had far reaching political and religious consequences, transforming the way we organize our thoughts about the past, present, and future.

“Without Paul Kosmin’s meticulous investigation of what Seleucus achieved in creating his calendar without end we would never have been able to comprehend the traces of it that appear in late antiquity…A magisterial contribution to this hitherto obscure but clearly important restructuring of time in the ancient Mediterranean world.”
—G. W. Bowersock, New York Review of Books

“With erudition, theoretical sophistication, and meticulous discussion of the sources, Paul Kosmin sheds new light on the meaning of time, memory, and identity in a multicultural setting.”
—Angelos Chaniotis, author of Age of Conquests