What is the trias politica?

The trias politica is the typical separation of powers in a government - the legislative power, the executive power and the judiciary power. These powers should be independent of each other, with each performing a different function, keeping each other in check. The legislative power drafts laws and regulations that govern the society. The executive power ensures these laws and regulations are upheld in society, while the judiciary power checks the performance of the executive power in upholding those laws and regulations.