"radical purpose" is correct and usable in written English.
You can use it to describe someone or something that is motivated by a goal or aim that is extreme or unconventional. For example, "He felt driven by a radical purpose to make a difference in the world."
Underneath the founders' mostly realistic suggestions, though, might have been a more radical purpose.
After the buzz wore off, the utopian communal aura of a Woodstock Nation gave way, almost immediately, to the reality of a Woodstock Market: a demographic target group about to have its dreams stripped of radical purpose and turned into commodities.
As they wonk away, it is not hard to find both Tories and Lib Dems who are increasingly open to the idea that the right to abstain should be extended to issues other than tuition fees, and that ministers too should be allowed to exercise it.Among the coalition's strengths, they feel, is its sense of radical purpose.
It feels like a Twilight Zone episode by way of a musical number, and it gives the film a sudden sense of radical purpose.
Ginsburg wrote that she believed the Religious Freedom Restoration Act had been enacted by Congress "to serve a far less radical purpose" than the court had interpreted it to.
This was a distinction Bentham learnt from d'Alembert (1838 43, III, 286), though he turned it to a more radical ontological purpose.
Of the 70 patients undergoing surgery (M = 37, F = 33), 56 (80%) had radical intervention purposes, while 14 (20%) underwent palliative surgery.
This is the preference of libertarians who see this as the moment for a radical restatement of purpose by the Republican Party.
Moreover, the rapidly falling birth rates in most poor countries suggest that, for family planning purposes, radical change is not needed.
The most positive aspect of this legacy was manifest in the selfless devotion of Pierre Mulele to radical change for purposes of meeting the deepest aspirations of the Congolese people for democracy and social progress.
