https://en.wikipedia.org/wiki/Australia
https://en.wikipedia.org/wiki/Australia#Colonial_expansion
https://en.wikipedia.org/wiki/Australia#Indigenous_peoples
https://www.creativespirits.info/aboriginalculture/politics/do-we-have-apartheid-in-australia
Unfortunately, the White Colonial Mentality established the White_Australia_policy.
https://en.wikipedia.org/wiki/White_Australia_policy#Immigration_Restriction_Act_1901
Some people would have liked the Australia of the 1950s & 60s to have become like another South Africa during the same era. Australia chose to go in another direction.
https://en.wikipedia.org/wiki/Australia-South_Africa_relations
Australia and Apartheid: The Ties That Bind
https://www.jstor.org/stable/20634562
https://www.tandfonline.com/doi/abs/10.1080/00358530601046851?journalCode=ctrt20
https://en.wikipedia.org/wiki/White_Australia_policy#End_of_the_White_Australia_policy
Thus, by the 1970s, Australia didn't want to emulate the South Africa of the 1970s.
https://en.wikipedia.org/wiki/Immigration_history_of_Australia#Modern_era
It's a vast land with less people than what Texas has.
https://en.wikipedia.org/wiki/Immigration_history_of_Australia#Opposition_to_immigration
While there are arguments about Australia growing at a rate that it can adequately handle, the country will continue to diversify as it grows. https://en.wikipedia.org/wiki/Immigration_to_Australia#Current_immigration_programs
https://en.wikipedia.org/wiki/Australia#Demographics
https://thedigitallabyrinth.blogspot.com/search?q=Australia
https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_area#Map