Well-developed

The ancient Roman and Byzantine empires had well-developed associations known as demes.

Avian flu is not particularly prevalent in well-developed countries like the U.K.

Turkey has a well-developed and relatively inexpensive internet along with widespread smartphone use.

The problem of interstellar travel was so enthralling that it sometimes became an obsession even to a fairly well-developed Utopian world. This could only occur if in the constitution of that world there was something unwholesome, some secret and unfulfilled hunger impelling the beings. The race might then become travel-mad.

This man has well-developed calves.

He has well-developed muscles.

She has a well-developed sense of humour.

The reputations of our universities and our research base are already under threat because of the fallout from the EU referendum result, which is making the UK an unfriendlier place for overseas scholars and students, as well as cutting off access to an important stream of research funding and to a vibrant and well-developed ecosystem for collaborative work.