In general yes, unless you go in some very remote village, populated only by very old people, in Southern Italy. basically, in the big-medium towns, where there is a constant inflow of tourists over the all year, you always find a way to be understood. Italians of all age tend to be very helpful when they see tourists in need of some help.
I always felt a deep admiration for Charles Darwin: pages of his "Beagle" diary are also very well written, and they are quoted in some Anthologies used in Italian high Schools. I am not myself working in life sciences, but when I read the "Origin" I was fascinated by the beauty of the reasoning.
Precisely because of this great admiration I think that we should not forget that Alfre Ruseel Wallace (http://en.wikipedia.org/wiki/Alfred_Russel_Wallace) formulated an evolutionary theory at the same time and independently from Charles Darwin. We all know the story: Darwin hurried to write his book when he heard that Wallace was almost ready to publish his own, and in fact, Darwin mentions Wallace in "Origin"...
RE: for a visit to Italy
In general yes, unless you go in some very remote village, populated only by very old people, in Southern Italy. basically, in the big-medium towns, where there is a constant inflow of tourists over the all year, you always find a way to be understood. Italians of all age tend to be very helpful when they see tourists in need of some help.AF