  The Red Queen Hypothesis, which suggests that continual evolution can result
from solely biotic interactions, has been studied in macroevolutionary and
microevolutionary contexts. While the latter has been effective in describing
examples in which evolution does not cease, describing which properties lead to
continual evolution or to stasis remains a major challenge. In many contexts it
is unclear which assumptions are necessary for continual evolution, and whether
described behavior is robust under perturbations. Our aim here is to prove
continual evolution under minimal conditions and in a general framework, thus
automatically obtaining robustness. We show that the combination of a fast
positive and a slow negative feedback causes continual evolution with a single
evolving trait, provided the ecological timescale is sufficiently separated
from the timescales of mutations and negative feedback. Our approach and
results form a next step towards a deeper understanding of the evolutionary
dynamics resulting from biotic interactions.
