Cycles have damn all to do with it. Trouble comes up, we deal with it. We recover and we forget. New troubles come up as they will and having forgotten how we dealt with it before we fluster about until we muddle through again. We just got off our butts and made a real effort to learn from the past we wouldn’t have the problems we do.
And yes, the past is relevant. It matters to us and we need to be concerned and to learn from it. But there are some who must insist on being slothful fools and ignoring matters. Trump isn’t the first and he won’t be the last, so get your shit together and learn.