The gods of the earth are active in their domains. In addition to the standard D&D pantheon, hundreds of other, lesser gods protect limited areas, groups, or ideas. The standard pantheon represents the dominant religious organization (most people worship one or another of them). However the minor gods and demigods attract followers who have specific needs or fall under their limited portfolio.
Multiple gods exist for every alignment. Some exist in a material way in a specific location (often lawful gods who like an ordered headquarters, or nature gods who like to be close to the land). Others exist primarily on another plain of existence and only interact with the material plain through emissaries or in a spiritual way.