Purpose
– The purpose of this paper is to present a mathematical model that can be used as an educational tool to reflect the philosophical aspects of sustainability.
Design/methodology/approach
– This is a descriptive paper.
Findings
– Everyone carries a sustainability deficit. Therefore, opportunities to reduce this deficit abound. Education is an excellent vehicle to achieve sustainability.
Practical implications
– Helping individuals with extremely high sustainability deficit to make minimum improvements is more beneficial than a further reduction of the ″deficit″ by those who have it already low. Further action is certainly encouraged, especially to quantify the sustainability index.
Originality/value
– The paper fulfils the need of providing an original model upon which educators may lean to, in order to enhance learning in sustainability.