puritanism
historically this is a reformer movement in 16th and 17th century Christianity, by men and women, who took seriously their calling as Christians to assist in bringing in the Kingdom of God. It is typified by the zeal of Oliver Cromwell and the New Model Army in England to transform the kingdom into a commonwealth and of the 'Pilgrim Fathers' in north America seeking to create this new order in a new world. The connotation of ' straightjacketed' joylessness overlooks the exuberance of communal life in the spirit, which was its daily characteristic.
See also:
Kingdom of God