Hey Zoomar, thanks for your positive feedback, confirming that my knowledge of this concept wasn't as sketchy as I 1st imagined.
My reply to your query (without writing an essay or thesis- lol)
The status of the Aboriginal tribes in Australia has always actually lagged far behind the status of Indians in North America in terms of recognition of land ownership and political sovereignty. Since English 'discovery' and settlement of Aust in 1770 and 1788, European settlers in Aust never accorded Aborigines any recognition of their title to land, or legitimacy as political entities, which was based on a perception that, even compared to 'settled' native American nations, Aboriginal tribes exhibited no signs of 'civilisation' at all, according to the criteria which you mentioned- esp in Lockean terms of 'improving the land'- and the British felt there were no recognisable tribal 'chiefs' or 'kings' with whom they could acknowledge and deal with directly. There were also other factors which undercut any British intention to accord no recognition to indigenous land rights and sovereignty, such as the absence of other foreign European powers to compete for territorial control of Aust, and hence no necessity to recognise certain powerful tribes as auxiliaries in the intercolonial struggle- unlike the French, Dutch and Spanish in North America courting the Iroquois, Huron, Delaware, Cherokee etc. In this sense, even though there were ppl living there, the colonists felt that the land was 'terra nullius', literally belonging to nobody, and so they were entitled to claim it by right of discovery over ppl who were merely 'savages'. Accordingly, thruout Aust and Tasmania, many British settlers were able to simply forcibly take the land and, although being inhibited by effective Aboriginal guerilla resistance at 1st, exterminate or expel the pre-existing indigenous tribes from these lands in which they'd lived for thousands of yrs, although the British colonial govt did view the indigenous ppl as British subjects whose rights were not to be violated. Reservations in the American sense were never really established in Aust, with Aboriginal communities being based on Christian missions or govt-run camps which established themselves in the outback in order to 'civilise the natives', and which were never given political control over tribal affairs or land ownership, unlike on Indian reservations- instead, the govt and/or missionaries were fully in control of all aspects of Aboriginal life, including the now infamous policy of removing any children born to Aboriginal mothers who were partially European, in order to 'breed the colour' out of them ('Stolen Generations').
The effects of Aust colonial hist are still being felt today, with Aboriginal communities thruout the country, esp here in the NT, being continually faced with huge economic, social and cultural problems, such as high unemployment, suicide, substance abuse and poor hygiene rates. Aboriginal title to land was only fully recognised in Aust in 1992 in the High Court case of MABO v QLD, where the Court held that the doctrine of 'terra nullius' was unjust, and that native title to the land had existed since before Euiro settlement. This revolutionary precedent enabled indigenous Australians to increase their political hopes for greater recognition legally, politically and economically, and led in 1993 to the establishment of a National Native Title Tribunal to hear and adjudicate proposed native title claims by Aboriginal representatives of groups from thruout the country. However, there's been greater internal dissension since then over native title and land rights, esp since the 1996 WIK case which stated that native title could co-exist on the same land as pastoral leases. MABO also stipulated that only the 'beneficial' title to land, or actual physical ownership of it, existed for Aboriginal ppl pre-colonisation, and didn't say anything of the 'radical' title, re their status as pre-existing politically sovereign entities, so no judgments were established re Aboriginal sovereignty over the land. Hence, Aboriginal groups since have been advocating indigenous sovereignty as part of the land rights movement, including urging the formation of a treaty (MAKKARRATTA in 1 Aboriginal language) with the Aust govt, and with the promotion of Aboriginal self-determination as part of the Reconciliation movement (which for the last few yrs has attempted to achieve genuine acknowledgment of the past, in order to move on for the future, among black and other Australians).
There's also been a great deal of controversy thruout the last few yrs, since the Howard govt since coming to power in 1996 adopted a very anti-native title stance, introducing the 1997 10-Point Plan in response to the WIK decision, which extinguished any native title rights on pastoral land in favour of lessees, and seriously limited other entitlements initially afforded to native title claimants. There's also been a lot of criticism directed at the Howard govt for his refusal to apologise to Aboriginal ppl over the 200 yrs of genocide and oppression suffered since 1st settlement, esp re the 'Stolen Generations' and his refusal to establish a commission of inquiry or tribunal to consider such claims by individual Aborigines who were forcibly taken from their parents as babies and raised in govt institutions. (BTW, you can find many links to native title and 'Stolen Generations' issues thru the Aust Legal Info Institute, or AUSTLII, at
http://www.austlii.edu.au) Thus, Aust still has a long way to go re issues of native title and substantive equality for Aboriginal ppl.