I'm very grateful to HR magazine for ranking me #4 on the HR Most Influential Thinkers list despite being a Professor of Finance, not HR, organisational behaviour, or business psychology. Finance and HR are typically seen as separate disciplines within academia, and separate departments within companies. But HR issues are finance issues - human capital is most firms' greatest asset, and investing in your people is often the most positive-NPV investment that a company can make.
A leading investor told me she asks CEOs about their people. Some CEOs are able to immediately answer what human capital challenges they face and what they are doing to address them. Others say “I didn't know you were going to ask me about my people; next time I'll bring along the HR director“. But human capital issues are CEO-level issues, not just for the HR director.