What is the fine-grained topic of the following text: Martin Landau, Federalism, Redundancy and System Reliability, 3 PUBLIUS 173, 187- 188 (1973) (noting that redundancy in the United States system, exemplified by federalism and checks and balances across governmental branches, was address first in Federalist No. Only return the topic.
Redundancy and System Reliability in United States Federalism