According to the opinion-page article "New Politics of the Future," Nov. 25, American politics should be reinvented and reoriented.The only way to reform the system is by reforming the two major parties. Neither of the parties are dedicated to being responsible and representative. I would urge every eligible voter to get into one of the major parties and demand responsible representation. Leslie B. Gray, Sparks, Nev. Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please address them to "Readers Write," One Norway St., Boston, MA 02115.