Throughout the world, countries such as the United States, the United Kingdom and Japan are striving to become world leaders in this promising new area. Canada has an incalculable advantage — we are already there. We have been leaders since James Till and Ernest McCulloch discovered stem cells more than 50 years ago. Canada’s foundational research in stem cell biology has underpinned all subsequent work on clinical applications in regenerative medicine, stem cell-related drug discovery, and cell and tissue engineering. Stem cell science is, truly, Canada’s science.