Great question, especially as the field has evolved, and as "ESG" has become something of a buzzword—with a fuzzy definition. Corporate citizenship is the combination of rights, responsibilities, obligations, and privileges of a firm, as exercised within society. In other words, corporate citizenship is the whole topic. ESG, CSR, and sustainability are elements within this larger whole. CSR is the activity that's happening within a firm. The projects. The campaigns and initiatives. It might take place inside a specific department or, ideally, be extended throughout and aligned with the entire company. ESG is the taxonomy. It's the way in which we categorize corporate citizenship efforts: some are environmental; some are socially based; others are governance related. Taken together, all these efforts are part of the work that is corporate citizenship.