The Crusades were a far more complicated series of events than the anti-Catholic statements of some historians would suggest. (faith.org.uk)
He may also think that the very complicated series of steps that the experts propose are not for him — maybe the very holy can follow this procedure but the ordinary man or woman has neither the time nor the interest to do so. (religion-online.org)
But it does so by a more complicated series of inter-related largely unmeasured processes, ignoring simpler explanations. (judithcurry.com)