Results/Conclusions All three sections suggest that there is no contradiction between the full body of theory and the observation of frequent intraguild predation in natural systems. The literature review shows that the availability of refuges and presence of self-limitation by predators (both known to promote coexistence) should be regarded as the norm in natural food webs. The new models show that life-history differences in diet, population cycles, and adaptive defense also provide mechanisms that permit IGP systems to persist over very wide ranges of enrichment. Finally, the evolutionary models show that IGP is generally superior to pure predation, and that this is particularly true of variable environments. The conclusion is that there is no contradiction between theory and data on the subject of intraguild predation. Together, they argue that the phenomenon is expected to be, and actually is, quite common.