The challenges that labour law currently faces are well known. The emergence of new forms of work and the growing importance of technology in the age of the Fourth Industrial Revolution are important tests of the resilience of this field of law and its function: regulating the labour market. Therefore, it is becoming increasingly important to examine the fundamentals of labour law, especially how subordinate labour is addressed in various countries’ constitutions, in order to focus the analysis of the new phenomena affecting labour relations on their fundamental...