Deng Linlin of China competes in the balance beam during the women's gymnastics qualification in the North Greenwich Arena during the London 2012 Olympic Games July 29, 2012. Reuters/Brian Snyder The "China's going to collapse" thesis has been one of the more popular narratives pushed forward recently — mostly regarding its economic model and its political system.

Beijing's economic model, however, is "probably sustainable" — and it's imprudent for the US to make policy decisions based on the assumption that China will collapse, argue former Australian Prime Minister Kevin Rudd and Eurasia Group president Ian Bremmer.

"Sorry, but on balance, the Chinese economic model is probably sustainable," Rudd wrote in his summary report on "The Future of US-China Relations Under Xi Jinping."

"On the sustainability of Chinese economic growth as the continuing basis of Chinese national power, on balance we should assume a Chinese growth rate in the medium to medium-high range (i.e., in excess of 6%) as probable" for the next decade, he continued.

He highlights the following three major points regarding his conclusion:

One, Beijing has a "vast battery" of policy responses to all of China's economic problems, and he doesn't assume they're destined to fail. Further, if China's growth rate begins to falter, Beijing has "sufficient fiscal and monetary policy capacity to intervene to ensure the growth rate remains above 6%," he writes.

Next, Rudd writes that it's also unconvincing to argue that China's transition into a new consumption-based model "is also somehow doomed to fail." He adds that it's "a sophisticated policy blueprint developed over many years" with "a high level of political backing to drive implementation."

Finally, though he concedes that China faces plenty of policy challenges that could hurt Beijing's economic program, Rudd argues that it's "just plain wrong" to assume China's policy elites are "somehow ... less capable" in meeting coming economic challenges than in the past.

"For these reasons, and others concerning the structure of Chinese politics, the report explicitly rejects the 'China collapse' thesis," Rudd concludes in that section of the report.

President Obama meets with Chinese leader Xi Jinping Reuters Importantly, Rudd and Bremmer say, China's collapse isn't what people should be worrying about.

At a lunch-and-discussion at the Asia Society on Wednesday, Bremmer and Rudd argued that the real danger was that Washington would not have a medium- to long-term response to China's concrete geoeconomic strategy.

"What really worries me, as a friend of this country, is this 'China collapsism' thesis [is] a great danger in that it induces policy complacency in this country, among other things," Rudd said at the event.

"It would be imprudent in the extreme for America's China policy to be based on an implicit (and sometimes explicit) policy assumption that China will either economically stagnate or politically implode because of underlying contradictions in its overall political economy," Rudd wrote in the China-US report.

A Chinese navy sailor (R) guides a helicopter to land on Chinese destroyer Harbin during the Joint Sea-2014 naval drill outside Shanghai on the East China Sea, May 24, 2014. Chinese and Russian navies staged exercises on the East China Sea on Saturday to simulate anti-submarine and search-and-rescue operations. A total of 14 surface ships, two submarines, nine fixed-wing warplanes, six shipboard helicopters and two operational detachments are taking part in this year's week-long drill, state media reported. Picture taken May 24, 2014. REUTERS/China Daily Instead, Bremmer argued, the US should clearly define its foreign-policy agenda in response to China's economic rise — as some other entities are doing.

"When I go to Japan — the Japanese understand that [China's rise is something] they should be dealing with it every single day," he said at the Asia Society discussion. "It should affect their government. It should affect their national strategy. It should affect how their corporations think. Everything.

"They’re having that debate. And we're not having that debate. We're having a debate about Iraq — which we should have — but we're not having a China debate."

Check out Ian Bremmer's new book on US foreign policy, "Superpower," on Amazon here.