Arrange the following developments in Labour Welfare Movement in the correct order from earliest to the latest.
1. Voluntary organisations engaged in labour welfare expanded in number and influences.
2. Trade unions fought to bring about an improvement in the working conditions of labour and to raise their status socially and economically.
3. Some enlightened employers took the initiative to improve the living and working conditions of labour.
4. The state tried through legislation to regulate and improve the lot of labour.