Welcome to the Fifth

Bellairs Workshop on World Models, Causality, and Agents

February 26 - March 5, 2027

Abstract

AI agents that act in the real world are rapidly moving from prototypes to deployed systems, yet a fundamental challenge remains: how can an agent reliably predict the consequences of its actions? This is, at its core, a causal question. World models sit at the center of this convergence; a world model is essentially a causal model of the environment, predicting how the world changes in response to actions. As these models scale to complex, open-ended settings, the need for principled causal reasoning becomes urgent. How should agents learn to act when interventional data is scarce or dangerous to collect? Can counterfactual reasoning enable self-improvement from past experience? How do we assign credit across long action sequences, or anticipate side effects in environments too complex for trial and error?

This workshop brings together researchers working on causality, world models, and agentic AI to explore these questions and their intersections.

Topics of interest include, but are not limited to:
  • World models as causal simulators
  • Predicting and mitigating unintended side effects of actions
  • Learning to act from observational vs. interventional data
  • Counterfactual reasoning for agent self-improvement
  • Causal credit assignment in multi-step trajectories
  • Causal abstraction for planning
  • Safe decision-making under causal uncertainty

This is a sequel to the 2022, 2023, 2024, and 2025 workshops.

Participants

* Organizers

More participants to be announced as invitations are confirmed — stay tuned!
Goals

The Bellairs Workshop on Causality is a gathering of researchers interested in and actively working on various aspects of causality; this year's edition takes world models, causality, and agents as its theme. The workshop is meant to be a week filled with discussions, learnings, and ample opportunities for growing and strengthening our collaboration network. As such, we would consider that the workshop has fulfilled its goal if every attendee returns home:

  • having learned of new sub-areas to explore,
  • completed their understanding of a topic,
  • laid the foundations for a new research idea,
  • established new collaborations, and
  • made new friends in the field.

Guidelines for open questions
As our focus for this workshop is the development of new ideas and collaborations, we have planned the workshop activities so that a significant portion of the program is reserved for discussions around thought-provoking questions and open problems. For these discussion periods to be more animated and fruitful, we ask that participants bring with them the ideas that excite them and the questions that they would like to see addressed by the community. During these discussion sessions, every participant will have the opportunity to briefly present their questions and discussions on possible solutions or avenues for their resolution will follow.

In order to facilitate the sharing of open questions and the exchange of ideas, we ask that participants observe the following guidelines:

  • Any open problem discussed at the workshop is not to be shared widely with the public without informing their initiator (the person who posed the question at the workshop) and their consent.
  • If you wish to work on one of the presented questions after the workshop, we ask that you contact the initiator to make arrangements for collaboration.
  • If you publish work that started at Bellairs, please consider acknowledging the Bellairs Workshop on Causality in your publication.
Program

The workshop will take place from February 26 to March 5, 2027. Each day will consist of morning lectures on relevant topics (9:00-12:00), afternoons will be left open for collaboration and discussion, and evenings will be reserved for collaborative work towards open problems (7:00 pm - exhaustion). The detailed program will be posted closer to the workshop.

Detailed schedule TBA.

Logistics
Venue The workshop will be held at the Bellairs Research Institute of McGill University in Barbados, which provides the perfect environment for bringing together a small group of people in a quiet and casual setting. See it on the map.
Airport arrival Bellairs is about a 40 minute drive from the airport, and as many participants land around the same time on the same date, it often makes sense to share a taxi to the institute. To get to the institute, you can pick a taxi outside of the baggage claim area at BGI airport. If the driver does not know where the Bellairs institute is (they usually do), tell them it is beside Folkestone Marine Park in Holetown. Alternatively, we would be happy to arrange your transportation from the airport to Bellairs by booking a driver in advance, who will be waiting for you at the arrivals exit of BGI near the other taxis. To opt-in to this option, you need to indicate this on the Arrival Spreadsheet (please check your email for the link). In all cases, please bring enough USD or BBD to pay for the trip. Many taxis do not accept card payments.
Arriving at Bellairs The premises are protected by a gate for which you will receive the password a few days in advance. Once you arrive, you will find your room assignments and get the key from a key box for which we will also communicate a password a few days in advance.

IMPORTANT: If you arrive or depart outside of the workshop dates (February 26 - March 5), you need to book your own accommodation. It might be possible that Bellairs has available rooms for you to stay at during this period, but you must contact Bellairs directly to book your accommodation outside the workshop dates. We cannot guarantee availability outside the dates assigned to our group.
Accommodation The Bellairs research institute is located right on the beach in the Folkestone Marine Park. The facilities are minimalistic, but comfortable, and the beach is right outside the door. Given the limited number of rooms available, most participants will need to be paired. To get a sense of the premises, check out the Bellairs website or take a look at the pictures from last year.
Meals Buffet-style meals will be available on the first morning for breakfast and every day for dinner. These will be served in the outdoor classroom from 8-9 am and 6-7 pm, respectively. You will be charged for these according to the number of nights you spend at Bellairs. For the subsequent breakfasts, we will buy groceries based on the preferences of participants, and the amount will be included in the registration fee. Lunch is on your own. There are plenty of options nearby and we usually walk somewhere as a group.
What to bring In terms of clothing, you should take into consideration that the lecture hall is outdoors and that the weather will be quite hot. Do not forget to bring your bathing suit, beach towel, and snorkeling equipment since Bellairs is located right in front of a coral reef. You should also bring soap, shampoo, sunscreen, and mosquito repellent. Bringing ear plugs is also a good idea if you are a light sleeper as there can be noise from the nearby road or park in the morning.
Currency Currency: The local currency is the Barbadian Dollar (BBD), but you can pay in USD everywhere (1 USD ~ 2 BBD). You can pay by credit card almost everywhere, but it’s safe to carry cash. In fact, it is encouraged to bring some cash with you as many places (e.g. food carts and taxis) do not take payments with cards.

Map of the Bellairs Research Institute and surrounding area in Holetown, Barbados

For questions please contact Alexandre Drouin or Perouz Taslakian