The energy sector's social license to operate is persistently undermined by a profound disconnect between corporate sustainability agendas and the lived realities of host communities, who bear the direct brunt of environmental impacts while often being excluded from meaningful benefit-sharing and decision-making. This chapter directly confronts this systemic failure by analysing the critical, yet frequently marginalised, role of host communities as central stakeholders in achieving genuine environmental sustainability. It begins by precisely defining the “host community” within diverse energy contexts, from extraction sites to renewable energy parks. The analysis maps the spectrum of environmental sustainability challenges these communities face and critically examines the breakdowns in understanding and trust with corporate operators. It evaluates a range of stakeholder engagement strategies and dissects the evolving legal and policy frameworks at national, regional, and global levels, using Nigeria, Canada, the EU, and Kenya as illustrative case studies. Through this comparative lens, the chapter identifies the concrete criteria for community acceptance, including procedural justice, equitable benefit distribution, and the mitigation of cumulative environmental impacts. Ultimately, this analysis moves beyond a risk-management perspective, positioning proactive, rights-based community partnerships not as a concession but as a foundational prerequisite for resilient, equitable, and truly sustainable energy development.