Circular Economy (CE) is the buzzword of today, promising an economy able to prosper on limited resources by
closing material cycles. However, there is no guarantee that simple strategies of material cycling, as propagated
by the various definitions of this concept, will indeed lead to an economy able to manage the world's resources,
pollution and societal demand within environmentally sustainable levels. Based on the shortcomings of the
present mainstream definitions of CE, this paper proposes an integrative, cascading, resource-based approach
aimed at an environmentally sustainable and socially beneficial economy. The international community agrees
on the necessity to maintain the current environmental equilibrium to ensure equity for future generations and
to allow human well-being and dignity already in the present. Accordingly, physical and environmental limitations
are identified, that are to be observed to make CE sustainable. This paper then suggests that a transition
towards a sustainable resource-based CE goes hand in hand with a paradigm shift in the way environmental
considerations are perceived by individuals, codified in different normative frameworks and dealt with by
private companies. It therefore opens the discussion by underlying some challenges that could appear in the view
of transitioning to CE.