For a long time, the same party ruled both at the centre and in most of the states. This meant that State governments did not exercise their rights as autonomous federal units.
In those days, the Central government would often misuse the Constitution to dismiss the State governments that were controlled by rival parties. This undermined the spirit of federalism.
After 1990, there was a rise of regional parties in many states. This was also the beginning of the era of Coalition Government at the centre. This led to a new culture of power sharing and respect for the autonomy of State Governments.