as i understand it there are some thought's schools who have tried to release this "energism"... neo-platonicians, early christians (before the christianism was tainted by an "universal message" and i think some things like that have survived until relativly recently... see Master Eckhart for instance...) but also many dissidances of hinduism(janinist, and buddhist as buddhism can be seen as an hinduism dissidance, well at least historically it is)... it has always failed to be applied...
1- for the reason you've already mentionned, kiya... opposition of all those who have power and are decided to hold on it... And either they will oppose directly this idea or they will twist it to their advantages (what has done the Roman church with many pagan, and Jewish thoughts that seemed to oppose them, for instance... well Roman Church is far for being alone to have acted like this... and it is not proper to religious concepts)
2- Each time these attempts to create an energism are not unlinked to particular cultural and social background... For instance the goal of neo platonism was to nurrish the Antic Greek society with some spirituality, the goal of buddhism (at its of founding but i think in a way it is always true) was to reform, open and elargish (to no indian and particularly no twice born indians) the very violent founding of indian society... => i think these attempts are just not understandable out of the circumstances where there are born then where there are developping.
MG!!! The most infamous member these forums have ever got!