Are We Progressing from Reductionism to Holism?
Contrary to what some people think, probably not.
For example, there used to be a theory that ulcers were psychosomatic. That was replaced by the more reductionist approach of assuming that gut problems were caused by bacteria in the gut. The claim that we're advancing out of the dark ages of reductionism into a glorious holistic future doesn't always hold water.
There's the alternative theory that digestive problems are caused by Unix operating system commands: awk, grep, fsck, nroff…