Single party system or One Party State may be defined as one in which only one legal and legitimate political party is constitutionally recognised in the country. No other party is recognised and can therefore not exist. The main features of one party state may be summarized as follows;

The Congress of Angostura is known as the Constituent Assembly convened in 1819 by the Venezuelan liberator, Simón Bolívar. It met in the city ​​of Santo Tomás de Angostura, in what is now Ciudad Bolívar, east of the Bolivarian Republic of Venezuela. The Congress of Angostura was made up of 30 deputies who belonged to 7 of the former provinces of the Captaincy General of Venezuela. His objective was to unite Venezuela and New Granada into a single nation, called Colombia.