A lesser known evangelical declaration, the Manila Manifesto (1989) was adopted by the Second International Congress on World Evangelization  in Manila, Philippines.  Regarding the gospel and our social responsibility, I would like to post an excerpt:

The authentic gospel must become visible in the transformed lives of men and women. As we proclaim the love of God we must be involved in loving service, as we preach the Kingdom of God we must be committed to its demands of justice and peace.

Evangelism is primary because our chief concern is with the gospel, that all people may have the opportunity to accept Jesus Christ as Lord and Saviour. Yet Jesus not only proclaimed the Kingdom of God, he also demonstrated its arrival by works of mercy and power. We are called today to a similar integration of words and deeds. In a spirit of humility we are to preach and teach, minister to the sick, feed the hungry, care for prisoners, help the disadvantaged and handicapped, and deliver the oppressed. While we acknowledge the diversity of spiritual gifts, callings and contexts, we also affirm that good news and good works are inseparable.