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The observed orbital period distribution of cataclysmic variables (CVs), thespace density derived from observations, and the observed orbital periodminimum are known to disagree with theoretical predictions since decades. Morerecently, the white dwarf (WD) masses in CVs have been found to significantlyexceed those of single WDs, which is in contrast to theoretical expectations aswell. We here claim that all these problems are related and can be solved ifCVs with low-mass white dwarfs are driven into dynamically unstable masstransfer due to consequential angular momentum loss (CAML). Indeed, assumingCAML increases as a function of decreasing white dwarf mass can bring intoagreement the predictions of binary population models and the observedproperties of the CV population. We speculate that a common envelope likeevolution of CVs with low-mass WDs following a nova eruption might be thephysical process behind our empirical prescription of CAML.

Empirical consequential angular momentum loss can solve long standing problems of CV evolution