Rare city encounters drive people to project clear-cut personas. [causal]
In the same sense there operates an apparently insignificant factor which in its effects however is perceptibly cumulative, namely, the brevity and rarity of meetings which are allotted to each individual as compared with social intercourse in a small city. For here we find the attempt to appear to-the-point, clear-cut and individual with extraordinarily greater frequency than where frequent and long association assures to each person an unambiguous conception of the other’s personality.
Georg Simmel, on individuality and social…, loc. 759