Balance between civilian and military techs

In many RTS games tech advances are almost exclusively military (e.g. StarCraft). But in most TBS and some RTS games the research and production costs of top-end military techs are so high that you have to build up your economy and your research productivity first (RTS - Age of Empires and Empire Earth, where one of the most significant costs is going up an epoch; TBS - the Civilization series and Master of Orion series).