At lower charge densities (f C ≤ 0.7), however, the region where the RPA dominates grows significantly. At f C = 0.5, RPA dominates to relatively large values of φ P , with < 1 until roughly φ P ≈ 0.07. Notably, this is beyond the phase boundary for f C = 0.5 in Figure , such that coacervate is primarily driven by RPA. This transition to fluctuationdriven phase separation is also apparent in the salt partitioning, with f C = 0.6 being the point at which the value of λ starts to become consistently > 1 in our model. This observation is broadly consistent with experimental data, which that such a transition in behavior occurs around f C = 0.5; however, we also expect that these predictions are sensitive to specific model parameters and that any prediction for the transition from RPA-dominated to TMdominated behavior will be situation-dependent. primitive model) the TM term is dominant. However, as the linear charge density is decreased, the RPA term eventually becomes dominant.