The Kesavananda Bharati case is considered a pivotal judgment in Indian constitutional law, limiting Parliament's amending powers and safeguarding the Constitution's essential features. The other cases mentioned are significant but did not lay down the basic structure doctrine. Golak Nath case held that Fundamental Rights cannot be amended. Sajjan Singh case upheld Parliament's power to amend all parts of the Constitution. S.P. Gupta case dealt with the independence of the judiciary.