Why do political platforms? how are platforms useful to voters

Political parties create platforms in order for them to create methods to resolve various issues in society. These platforms are very useful for voters as it gives them an idea on how it will help them further in various aspects - ranging from resolving violence to the point of equaling their rights.

Hope this helps! :) <3

which empire had the greatest influence on the history and cultural development of russia?

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.