1872 Trade unions permitted.
Trade union = An organisation of people with similar occupations,
which defends the rights of employees and fights for better
working conditions.
Means: Demonstrations and strikes
Examples of social laws:
1874 Children's Act (Kinderwet van Van Houten)
1901 Industrial Injuries Act (Ongevallenwet)
1919 45-hour working week and 8-hour working day