The Constitution of India includes several important features that keep it relevant:

• Fundamental Rights - These protect individual freedoms such as equality before the law, freedom of speech and the right to education.
• Fundamental Duties - These suggest the responsibilities of citizens, for example respecting the Constitution and protecting the environment.
• Directive Principles - These guide the government to make laws that promote social welfare, health, education and economic justice.
• It sets up a three-tier government (Central, State and Local), with a clear separation of powers so that no single body holds all authority.

It is a living document - it can be amended to meet new needs; for example, rights like the Right to Education and institutions like Panchayati Raj were added later.