Tibetan Buddhism, the international religion

Tibetan Buddhism, the international religion « earlyTibet.com:

"These days it’s easy to think of Tibetan Buddhism as an international religion. We usually see this as something that came about in the second half of the twentieth century, when so many Tibetan lamas fled the country. Before that time, Tibetan culture is often presented as if it was enclosed within the mountain fastness of Tibet, taking its own path in splendid isolation.

But if you know a bit of history, this picture doesn’t look quite right. Tibetan Buddhism was very popular at the [...]"