Because Judiciary and written constitution checks and Balances the powers of other organs such as legislature and execurive

Introduction:
Federalism is a system of government where power is divided between a central authority and regional or state governments. The success of federalism depends on several factors, including a powerful judiciary and a written constitution. These two elements play a crucial role in ensuring the proper functioning and stability of the federal system.

Powerful Judiciary:
A powerful judiciary is necessary for the success of federalism due to the following reasons:

1. Conflict Resolution: A federal system often leads to conflicts and disputes between the central government and the regional governments. A powerful judiciary acts as an impartial arbiter that can resolve these conflicts and maintain the balance of power between the different levels of government.

2. Interpretation of the Constitution: The judiciary plays a vital role in interpreting the provisions of the constitution, which serves as the foundation of federalism. It ensures that the powers and rights of both the central and regional governments are respected and upheld, preventing any encroachment on their respective spheres.

3. Protection of Individual Rights: A strong judiciary safeguards individual rights and liberties, which are essential in a federal system. It acts as a check on the potential abuse of power by any level of government, ensuring that citizens' rights are protected and upheld uniformly across the country.

4. Enforcement of Federalism Principles: The judiciary enforces the fundamental principles of federalism, such as the supremacy of the constitution, division of powers, and the concept of dual sovereignty. It ensures that both the central and regional governments adhere to these principles, preventing any concentration or misuse of power.

Written Constitution:
A written constitution is equally important for the success of federalism due to the following reasons:

1. Clarity and Certainty: A written constitution provides a clear and specific framework for the division of powers between the central and regional governments. It outlines the rights and responsibilities of each level of government, reducing ambiguity and ensuring certainty in the functioning of the federal system.

2. Limiting Government Power: A written constitution acts as a check on the powers of the government by clearly defining the limits of their authority. It prevents any level of government from exceeding its jurisdiction, thereby maintaining the balance between the central and regional governments.

3. Protection of Minority Rights: A written constitution includes provisions to protect the rights of minority groups. It ensures that minority communities are not marginalized or discriminated against by any level of government, promoting inclusivity and harmony within the federal system.

4. Amendment Process: A written constitution typically includes provisions for its amendment, allowing for necessary changes to be made over time. This flexibility ensures that the federal system can adapt to evolving societal needs and challenges while maintaining its core principles.

Conclusion:
In conclusion, a powerful judiciary and a written constitution are essential for the success of federalism. They provide a mechanism for conflict resolution, protect individual rights, enforce federalism principles, ensure clarity and certainty in the division of powers, and limit government authority. These elements contribute to the stability, balance, and effective functioning of a federal system, promoting a harmonious and inclusive governance structure.