The choice between ragged right or justified typesetting depends on the nature of the text you have to set. A discussion about this is mostly off-topic for this site, but some TeXnical aspects are surely on topic.
The algorithm TeX uses for breaking lines is equally good for both methods and can be tuned up to give a pleasing result: one can for instance choose to avoid hyphenation in ragged right text (the standard
\raggedright setting in LaTeX) or allow it (with
\RaggedRight from the
The facilities provided by
microtype can certainly be helpful also with ragged right typesetting. Here's an example, where the paragraph turns out to be one line longer without
Here's the result when we load
ragged2e and use
\RaggedRight instead of
\raggedright, thereby allowing hyphenation:
I should note that in this case one line turns out to be overfull when
microtype is active (top paragraph), precisely
Overfull \hbox (0.12758pt too wide) in paragraph at lines 7--7
\OT1/cmr/m/n/10 (+7) re-sen-ta-tion of, as far as I know, the things in them-se
lves; as I have shown else-
However, this is a false problem, because in a ragged right setting one can increase
\hfuzz to a higher value than the 0.1pt default. One should also tune up the parameters for
microtype more carefully.
Here's the last example, where the paragraph is set in two column mode, left with
microtype, right without it:
I'll leave the evaluation of the result to personal judgment.