PANTHEON Deliverable 5.1, submitted in February, brings stakeholder perspectives into Integrated Assessment Modelling (IAM) — the modelling approach used to explore pathways to carbon neutrality. We ran two online scoping workshops — one with EU stakeholders, one with Chinese stakeholders — plus a follow-up survey, asking participants to imagine their own desirable post-decarbonised world and reflect on the time horizons, actions, and speed of change needed to reach it. Across both regions, decarbonisation goals were broadly shared, but transition pathways were contested. Stakeholders converged on decarbonisation as a systemic socio-technical transformation, with the same priorities — water security, pollution reduction, biodiversity protection, food production, and CO₂ reduction — but diverged on how to get there. EU stakeholders emphasised participatory, decentralised approaches, with internal tensions around green growth versus sufficiency; Chinese stakeholders emphasised state-led, policy-aligned pathways, with less dispute about growth itself. The results feed into WILIAM as narrative inputs for scenario development.