diff --git a/configs/llm/society_campaign_s1.yaml b/configs/llm/society_campaign_s1.yaml
new file mode 100644
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--- /dev/null
+++ b/configs/llm/society_campaign_s1.yaml
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+# The society campaign: 4-arm ablation, one seed per job (founders trained inline, no cache races).
+# Seed 1 runs locally (A4000, queue insurance); seeds 2-4 on CX3 (hpc/llm_society.pbs, L40S).
+experiment: llm_society_campaign
+kind: llm_society
+base_model: Qwen/Qwen2.5-0.5B-Instruct
+seed: 1
+agents: 8
+generations: 10
+arms: [full, no_grounding, no_sex, no_diversity]
+g: 0.5
+lam: 0.3
+n_test: 40
+n_val: 30
+n_conf: 90
+n_inherit: 600
+n_candidates: 6
+elitism: 1
+n_parents: 4
+epochs: 3
+spec_train: 600
+spec_epochs: 3
+lora: {r: 16, alpha: 32}
+output: {dir: results/llm_society_campaign/s1}
diff --git a/configs/llm/society_campaign_s2.yaml b/configs/llm/society_campaign_s2.yaml
new file mode 100644
index 0000000..c536e5f
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+++ b/configs/llm/society_campaign_s2.yaml
@@ -0,0 +1,23 @@
+# The society campaign: 4-arm ablation, one seed per job (founders trained inline, no cache races).
+# Seed 1 runs locally (A4000, queue insurance); seeds 2-4 on CX3 (hpc/llm_society.pbs, L40S).
+experiment: llm_society_campaign
+kind: llm_society
+base_model: Qwen/Qwen2.5-0.5B-Instruct
+seed: 2
+agents: 8
+generations: 10
+arms: [full, no_grounding, no_sex, no_diversity]
+g: 0.5
+lam: 0.3
+n_test: 40
+n_val: 30
+n_conf: 90
+n_inherit: 600
+n_candidates: 6
+elitism: 1
+n_parents: 4
+epochs: 3
+spec_train: 600
+spec_epochs: 3
+lora: {r: 16, alpha: 32}
+output: {dir: results/llm_society_campaign/s2}
diff --git a/configs/llm/society_campaign_s3.yaml b/configs/llm/society_campaign_s3.yaml
new file mode 100644
index 0000000..0f04b11
--- /dev/null
+++ b/configs/llm/society_campaign_s3.yaml
@@ -0,0 +1,23 @@
+# The society campaign: 4-arm ablation, one seed per job (founders trained inline, no cache races).
+# Seed 1 runs locally (A4000, queue insurance); seeds 2-4 on CX3 (hpc/llm_society.pbs, L40S).
+experiment: llm_society_campaign
+kind: llm_society
+base_model: Qwen/Qwen2.5-0.5B-Instruct
+seed: 3
+agents: 8
+generations: 10
+arms: [full, no_grounding, no_sex, no_diversity]
+g: 0.5
+lam: 0.3
+n_test: 40
+n_val: 30
+n_conf: 90
+n_inherit: 600
+n_candidates: 6
+elitism: 1
+n_parents: 4
+epochs: 3
+spec_train: 600
+spec_epochs: 3
+lora: {r: 16, alpha: 32}
+output: {dir: results/llm_society_campaign/s3}
diff --git a/configs/llm/society_campaign_s4.yaml b/configs/llm/society_campaign_s4.yaml
new file mode 100644
index 0000000..7e265b9
--- /dev/null
+++ b/configs/llm/society_campaign_s4.yaml
@@ -0,0 +1,23 @@
+# The society campaign: 4-arm ablation, one seed per job (founders trained inline, no cache races).
+# Seed 1 runs locally (A4000, queue insurance); seeds 2-4 on CX3 (hpc/llm_society.pbs, L40S).
+experiment: llm_society_campaign
+kind: llm_society
+base_model: Qwen/Qwen2.5-0.5B-Instruct
+seed: 4
+agents: 8
+generations: 10
+arms: [full, no_grounding, no_sex, no_diversity]
+g: 0.5
+lam: 0.3
+n_test: 40
+n_val: 30
+n_conf: 90
+n_inherit: 600
+n_candidates: 6
+elitism: 1
+n_parents: 4
+epochs: 3
+spec_train: 600
+spec_epochs: 3
+lora: {r: 16, alpha: 32}
+output: {dir: results/llm_society_campaign/s4}
diff --git a/hpc/llm_society.pbs b/hpc/llm_society.pbs
new file mode 100644
index 0000000..452dd38
--- /dev/null
+++ b/hpc/llm_society.pbs
@@ -0,0 +1,25 @@
+#!/bin/bash
+# The LLM society campaign (C3): 4-arm ablation, one seed per array element on one L40S each.
+# Seed 1 runs locally on GG's A4000 (queue insurance); this array covers seeds 2-4. Each job is
+# self-contained (founders trained inline, adapters under models/, deleted per generation), so a
+# killed element reruns cleanly and elements schedule independently. ~2.5-3.5 h measured-scale
+# runtime; 6 h walltime for backfill-friendly margin.
+#   submit:  qsub hpc/llm_society.pbs      status: qstat -u $USER
+#PBS -l select=1:ncpus=8:mem=64gb:ngpus=1:gpu_type=L40S
+#PBS -l walltime=06:00:00
+#PBS -N lam_society
+#PBS -J 2-4
+
+cd "$PBS_O_WORKDIR"
+export HF_HOME="$EPHEMERAL/hf_cache"
+export TOKENIZERS_PARALLELISM=false
+export UV_CACHE_DIR="$EPHEMERAL/uvcache"
+
+source .venv/bin/activate
+nvidia-smi --query-gpu=name,memory.total,driver_version --format=csv,noheader
+
+python -m llm.experiment "configs/llm/society_campaign_s${PBS_ARRAY_INDEX}.yaml"
+
+# results/llm_society_campaign/s${PBS_ARRAY_INDEX}/ written in-place. Sync back:
+#   rsync -avz hpc:'.../results/llm_society_campaign/' results/llm_society_campaign/
+echo "done: $(date)"