Undeclared strikes

Illegal strikes
Wildcat strikes

Background

Undeclared strikes emerged as a significant global concern during the industrial expansion of the 20th century, when spontaneous work stoppages disrupted key sectors without prior notice or legal sanction. Their prevalence was first systematically documented in postwar Europe, prompting international labour organizations to monitor their frequency and impact. Over time, governments and employers worldwide recognized undeclared strikes as indicators of unresolved workplace tensions, leading to increased scrutiny and debate over labour relations and collective bargaining frameworks.

Incidence

Strikes are not officially permitted in socialist countries, but they do occur. In some cases, industrial unrest takes the form of 'hidden strikes' which include widespread absenteeism, the slowing down of the production process, the increased production of defective goods, and the fluctuation of the work force.