It seems that many seek analysis of the causes and systemics of the current global crisis in either the theories of Marx or Ayn Rand.
IMO the theories of Marx and Ayn Rand are irrelevant in analysing or solving problems in the 21st century.
Why? Because the fundamentals, social, economic, political, cultural, technological, etc, in other words, the systemics and dynamics of our era, are very different than the epochs these theories were conceived and developed in.
The same applies IMO to most thinkers of past centuries.
IMO the problems of our era require fresh new thinking and new, modern, thinkers who will take into account the systemics and dynamics of our era in order to analyse the situations and problems and propose solutions or even causal analyses.