Continuing on The Philosophy of Nature: A Guide to the New Essentialism. Ellis' essentialism about physics and chemistry says that, for example, atoms of various elements are truly and unambiguously different and behave in ways that make them what they are. What does this entail? Get more at partiallyexaminedlife.com. Visit partiallyexaminedlife.com/support to get ad-free episodes and tons of bonus discussion. Learn about our new book at partiallyexaminedlife.com/book.