Predicted curves from our theory showing the onset and growth of a gel (i.e. each online group in Figs. 1 and 2, or each overall movement in Fig. 5) and how it depends on the average aggregation probability \(F\). The specific \(F\) value is determined by the initial composition of the population and the grouping mechanism, i.e. the collective chemistry, hence we show a variety of possible values as examples. An intervention to this collective chemistry will change \(F\) and hence can delay the onset of the gel as shown and curtail its growth. Specifically, the curve can be flattened by reducing the value of \(F\), i.e. by nudging the collective chemistry.