Over the last three hundred years, unions have advanced into a number of forms, influenced by differing political objectives. Accomplishments of unions vary, but may include:
• Provision of benefits to members: Early trade unions, like societies hat aide, often provided a range of benefits to assure members against joblessness, ill health, old age and funeral expenses. In many developed countries, these functions have been assumed by the state; however, the provision of professional training, legal advice and representation for members is still an important benefit of trade union membership.
• The right to negotiating where unions are able to operate openly and are recognized by employers, they may negotiate with employers over wages and working conditions.
: Unions may enforce strikes or



