1. A harmonized governance system for a heterogeneous agile environment, comprising: a computer-based policy administration element (PAE) communicatively coupled to respective management platforms of a plurality of individual agile environments that make up the heterogeneous agile environment, the PAE configured to administer and report governance policies, including rules, roles and assignment to resources of the heterogeneous agile environment according to abstracted and normalized (i) representations of the resources, (ii) operations which are capable of being performed by and on said resources, and (iii) roles assignable to subjects that will interact with said resources, and (iv) respective attributes of said representations, operations and roles; a computer-based policy decision element (PDE) communicatively coupled to receive indications of attempted governance operations by one or more subjects to resources within the individual agile environments that make up the heterogeneous agile environment, the PDE configured to determine and report whether the attempted governance operations should be permitted or not; one or more data sources accessible to the PAE and the PDE storing information about (i) the one or more subjects and respective attributes thereof, and (ii) resources of the heterogeneous agile environment and respective attributes of said resources; a computer-based policy enforcement element (PEE) communicatively coupled to the respective management platforms and resources of the individual agile environments that make up the heterogeneous agile environment, the PEE configured to enforce and report authorization decisions of the PDE, wherein different respective ones of the individual agile environments that make up the heterogeneous agile environment have individual, associated access policies for resources within the respective individual agile environments; each respective individual agile environment has an associated, respective access control system for subjects, resources, and operations of the respective individual agile environment; and the resources of each respective individual agile environment comprise one or more of compute systems, network systems, application containers, application systems, management systems, and storage systems.