Levi Leonard Conant (1857-1916) was an American mathematician known for his work in the field of number theory and its history. A scholar with an enduring interest in the evolution of mathematical concepts, Conant made significant contributions to understanding the development of number systems through his seminal work 'The Number Concept: Its Origin and Development', first published in 1896. This book elucidates the historical and cultural contexts in which numerical systems emerged and evolved across various civilizations, providing valuable insights to mathematicians and historians alike. Conant's grasp of mathematical history was backed by rigorous scholarship, as he explored the progress from primitive counting practices to the sophisticated abstractions used in his time. His literary style combined academic thoroughness with an accessible narrative, aiming to reach both his peers in the academic community and a broader audience interested in the genesis of mathematical ideas. Beyond 'The Number Concept,' Conant also contributed to academic journals, sharing his research and expanding the discourse on mathematical history. His academic career was largely spent at the Worcester Polytechnic Institute, where he served as a professor of mathematics and displayed an unwavering commitment to education and research in his discipline.