he Gulf Cooperation Council (GCC) region and the wider Arab world are faced with multiple inter-connected dilemmas embedded in the social, economic, and environmental pillars of sustainable development. The question of how to design effective sustainability strategies that are aligned with the context of the GCC region is a relevant one. In this special issue, contributors have investi-gated the obstacles to sustainable development in the GCC region, the impact of current development patterns on the sustainability agenda, and the way in which countries react to local, regional, and global sustainability pressures and debates. The issue aimed to provide a platform for academics to present policy-relevant research and practical steps being taken towards realising genuine sustainable development within the GCC region, while teasing out the major obstacles to this process. This regional focus is motivated by the shared challenge of GCC countries of reforming carbon-based economies as well as their systems of high subsidisation and universal benefits in order to incorporate sustainable concerns, merit-based rules, and more targeted policies. While these challenges are shared with other Arab countries, as well as other countries exporting oil and gas, the origins, current patterns, and future directions of sustainability reforms in the GCC region reveal interesting lessons to be learnt. The countries of the GCC (Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emi-rates (UAE)) are home to a large supply of fossil fuels and various types of minerals, and they are richwith regard to Arabic and Islamic culture and history. The economies of the GCC countries are characterised by their heavy dependence on exports of fossil fuels. These exports have generated significant revenues that have resulted in high per-capita income levels and decent living standards. Since the1970s, the dominant development view in the region centred on economic growth, wide job creation through public jobs for national citizens, a heavy reliance on immigrant workers, and an ecosystem for a comprehensive distribution of economic and social benefits among nationals. Owing to the significant revenues generated from oil and gas as well as the ambitious plans of the leadership withint he GCC, the GCC nations have transformed into very modern states during the past few decades. Recently, the fiscal sustainability of this model has been questioned in response to increasing demands from the growing population and economies for natural resources and for financial support. It is this factor that has made the biggest contribution to the sense of urgency regarding sustainability reforms in the region. Collectively, the GCC nations have a population of more than 40 million people. The region is one of the most urbanised in the world, with around 80% of the population residing in urban areas, mostly in close proximity to coasts where important ecosystems and cultural heritage are located. Roughly40% of the GCC region’s population are people born outside the region, of which the majority areAsian migrant labourers. Overall population growth is continuously increasing due to high fertilityrates among nationals and the influx of foreign workers. The high portion of foreign workers has given rise to various social and cultural debates related, for example, to identity, dependence, anddiversity. In response, GCC countries have sought to increase local capacities through education, nationalisation of human resources, or promotion of entrepreneurship ideals among the local population. To date, most sustainability research has been conducted in other regions, particularly in developed and emerging countries. We contend that there remains a distinct knowledge gap regarding the sustainability journey within other settings, and sought to rectify this through the valuable contributions in this special issue. These contributions have provided a much-needed regional focus and unravelled context-specific influences on the transition of GCC states towards a holistic sustainability agenda, discussing emerging trends and initiatives, and taking stock of practical lessons pertinent for the GCC region. Some of the obstacles to sustainability have been brought to the fore, including high energy subsidies and large footprints, the lack of renewables and low prioritisation of environmental sustainability, and the entanglement of socio-political realities with the realisation of truly sustainable policies and programmes. Papers in this special issue have highlighted how the GCC region has a special context in the wider Arab region in terms of being historically reluctant to effectively engage with the global sustainability agenda advocated by developed countries (Al-Saidi, Zaidan, and Hammad2019). This is despite theopenness of the region to adopt westernised concepts and embrace state-of-the-art technologies and design concepts (Al-Zo’by 2019; Zaidan2019). This apparent paradox is explained by the cautious approach of GCC countries towards sustainability in order to protect their carbon-based economies. The preferred path GCC countries are following is to learn from international best practices in order to address more pressing issues, such as the resilience of coastal areas, resource provision through clean technologies such as reuse and renewables options, addressing environmental risks to their coastal cities, or improving the sustainability engagement of local stakeholders (Abulibdeh,Al-Awadhi, and Al-Barwani2019; Abulibdeh, Zaidan, and Al-Saidi2019; Al-Awadhi, Charabi, andChoudri2019; Al-Saidi and Lahham2019; Hayman2019). In contrast, other regions in the Arabworld might not have the luxury of monetary revenues to selectively and gradually embrace sustain-ability. For example, due to rising demand and limited energy sources, Morocco has set a renewables target of more than 50% by 2030, far more ambitious than any GCC country. Furthermore, for countries such as Lebanon, the provision of sufficient food and basic education for growing popu-lations, including huge numbers of refugees, is a real challenge that spurs projects using innovations such as urban agriculture (Albakri and Shibly2019; Dehnavi and Suß2019). In contrast, access to food,energy, and water, alongside other comforts such as public jobs and good salaries, have been a prerogative of GCC citizens. In the GCC, sustainability is increasingly being perceived as a policy imperative of the twenty-first century, but also as a beneficial tool to sustain the basic functioning of a growing economy within healthy environmental boundaries. Furthermore, it represents a vehicle for states to gain legitimacy on the international scene in terms of being responsible towards the global community and caring about shared norms and challenges.