Wallace Line connected islands on the west (Sumatra, Java, etc.) with the Asian continent and with similar wildlife, and islands on the east such as New Guinea were connected to Australia and were characterised by the presence of marsupials. Wallace used his extensive travel in the region to propose a line to the east of Bali since "all the islands eastward of Borneo and Java formed part of an Australian or Pacific Continent, from which they were separated." The name 'Wallace's Line' was first used by Thomas Huxley in an 1868 paper to the Zoological Society of London, but showed the line
Define the Great Line 200 since 1997. The title of the album, according to keyboardist Christopher Dudley, comes from "defining that line for yourself between becoming the man or the woman that you want to be and the man or the woman other people want you to be." "Alternative Press" used the title as an example of how on this album Underoath seemed "acutely aware of the line that separates their spiritual core from the painful reality of being human," and how "even successful musicians need help staying on the right side of that line." Unlike "They're Only Chasing Safety", "Define the Great Line"