Early documentation dates the phrase back to 1966.[8] According to author of When Cultures Collide: Leading Across Cultures, Richard D. Lewis, the phrase is a form of expression of the relaxed attitude in Australian culture.[9] Anna Wierzbicka comments that the expression illustrates important parts of Australian culture, including: "amiability, friendliness, an expectation of shared attitudes (a proneness to easy 'mateship'), jocular toughness, good humour, and, above all, casual optimism".[3] She concludes that along with "good on you", the expressions reflect the "national character" and "prevailing ethos" of Australia.[11] Though initially utilized in Australia, the phrase migrated to New Zealand as well.[12][13]