The walls around many business schools remain high, eroding interdisciplinary education and research collaboration that might address some grand challenges facing society. In response, we adopt a public interest perspective and argue business schools should lower their walls to engage with other academic departments to address such grand challenges in a way that engenders social value. We identify forces for lower and higher walls that surround business schools and influence prospects for interdisciplinary collaboration. We highlight examples of successful relationships between business schools and other academic departments, which offer some optimism for a reimagined public interest mission for business schools. Finally, we draw out some boundary conditions to take a more contingent view of possibilities for such interdisciplinary collaboration encompassing business schools.