That’s a very western take on religion. Some have no belief in an end time with a static or cyclical world.

Sin/evil isn’t really a thing in many religions. Polytheistic religions for example can have multiple contradictory ideas for what the correct actions are.

Eschatology doesn't just have to do with the end times. It is "concerned with death, judgment, and the final destiny of the soul". Hinduism and Buddhism clearly address this. Confucianism and Shinto may be exceptions, and of course there are plenty others that I'm not familiar with, but eschatology is far from being only a preoccupation of Western religions.

Dropping the end of that quote completely changes the meaning it’s. "the part of theology concerned with death, judgment, and the final destiny of the soul and of humankind" It’s a separate idea from simple questions of the afterlife.

Buddhism is really interesting here because there was such a wide range of different beliefs involved some of which fit that idea and others don’t. https://en.wikipedia.org/wiki/Buddhist_eschatology

It doesn't completely change the meaning, it drops a subset of the meaning. Eschatology encompasses both types of ends. The OP seemed under the impression it only involved the end of the universe/world.

AND is not OR, but I understand your confusion.

You're assuming that the author was writing with mathematical precision. Dictionaries rarely are.

Here's an alternative definition from Merriam Webster:

> a belief concerning death, the end of the world, or the ultimate destiny of humankind