The ambitious UN-adopted sustainable development goals (SDGs) have been criticized for being inconsistent, difficult to quantify, implement and monitor. Disparaging analysis suggests that there exists a potential inconsistency in the SDGs, particularly between the socio-economic development and the environmental sustainability goals. Critiques also raise questions on the measurability and monitoring of the broadly framed SDGs. The goals are non-binding, with each country being expected to create their own national or regional plans. Moreover, the source(s) and the extent of the financial resources and investments for the SDGs are ambiguous. This chapter quantifies and examines the inconsistencies of the SDGs. It further inspects which of the underlying social, economic or environmental pillars are that most effective for achieving sustainable development. Analyses of the data reveal that the developed countries need to remain focused on their social and environmental policies. The developing countries, on the other hand, are better off being focused on their economics and social policies in the short run, even though environmental policies remain significant for sustainable development.