Human actions are causing climate change, pollution, and the loss of biodiversity, making our planet less safe. To address these problems, solutions must be developed from current and future research, involving different scientific fields and respecting diverse knowledge systems. It is essential to engage with society, as the relationship between science and society drives progress. Studying coasts as complex systems requires input from the natural sciences, social sciences, and humanities.

In the coastal zone, the triple planetary crisis manifests as accelerating losses and changes and increasing challenges and risks for people and livelihoods. Acceptance of a future existential crisis compels the urgency of corrective action to cause an inverse positive societal response to bend the negative trajectories of loss and damage. The rate and extent of corrective societal action (policies, laws, practices, knowledge, etc.) should at least keep pace with the projected rate of loss and environmental degradation. This urgency and acceleration of action are major societal challenges, especially considering the overwhelming evidence of impacts. In this paper, we offer three propositions for accelerating urgent actions and fostering innovation in coastal research and management, focusing on emerging trends and foundational changes. Scientists need to (1) reflect on the performativity of their research and perceptions of neutrality in anticipating the future of coasts; (2) think and act equitably in local and global partnerships; and (3) improve their engagement and willingness to innovate with society. This is not a call for linear or incremental change, but a call for the radical. The relationship between society and science drives progress and shapes our collective future.

Human actions drive climate change, pollution, and biodiversity loss, threatening our planet. To address these crises, we need solutions that blend current and future research, span multiple scientific fields, and respect diverse knowledge systems. Engaging with society is key. The bond between human society and science shapes our future. Coastal studies must integrate natural sciences, social sciences, and humanities.

Human wellbeing is the guiding goal of many public policies, yet its complexity often prevents present measurement and future projections of it. Here, using a global model and a wellbeing measure called Years of Good Life (YoGL), we show how climate change, economy, and social conditions together shape people's long-term wellbeing. We also introduce the ‘wellbeing cost of carbon' metric, which is similar to the social cost of carbon but measures the wellbeing loss due to carbon emissions instead of only economic loss. The results highlight that younger generations pay the highest price unless strong climate action is taken.

Human wellbeing is the ultimate end of sustainable development alongside planetary wellbeing. It relies on complex interactions between natural and social systems, including those between climate change, economic growth, and human mortality. Despite extensive analyses of individual climate impacts, their combined effects on long-term wellbeing are sparsely examined. Using a dynamic systems model of global climate, economy, environment, and society relationships and employing YoGL as an empirical wellbeing indicator, we present wellbeing projections in diverse socioeconomic and climate scenarios, and calculate the loss of human wellbeing due to carbon emissions. In a climate-optimistic scenario, 20-year-old females and males gain 10.4 and 7.5 YoGL, respectively, on average by 2100, while a pessimistic scenario reduces it by 8.5 and 11.3 years. Physical health remains the most restraining driver of long-term human wellbeing, while indirect climate impacts on education and poverty also reduce it by a similar extent in a climate-pessimistic scenario. The younger generations bear a much higher wellbeing cost of carbon unless strong climate action is taken. This study offers a new quantitative, empirically grounded and integrated perspective on climate impacts on human wellbeing, expanding beyond economic damages and the social cost of carbon.

Climate choices today shape our future wellbeing: Strong action boosts ‘good life’ years, inaction takes it away.