 Xue believed that this was a fundamental universal law of economics.Unlike Stalin, Xue believed there were principles that guided the socialist transition, the key one being the principle of "from each according to his ability, to each according to his work"; this principle would guide socialist development, even when China had reached advanced socialism, and would be replaced with "from each according to his ability, to each according to his need" only when there existed general abundance.Xue based his arguments upon the economic policies pursued during the Cultural Revolution, which he believed had led to "the most severe setbacks and heaviest losses suffered by the Party, the state and the people since the founding of the People's Republic".