Unilever's plan to merge its food business with spice maker McCormick is the latest move in a sector that's fighting to stay relevant as the growth model that has powered big consumer products companies for decades is eroding. As the post-pandemic pricing supercycle fades and growth in massive markets like China stalls, the industry's titans are moving away from the bigger-is-better conglomerate model, and towards what experts call "targeted scale." The tie-up between Unilever and McCormick