Tackling warming is 'great moral crusade for our times' – Gordon Brown - Scotsman.com News PRIME Minister Gordon Brown has warned that saving the environment is the "great moral crusade for our times" – equivalent to the abolition of slavery. He really believes that he is a William Wilberforce, not a grubby failed third rate politician stitching together a sleazy deal designed to enrich crooks and liars. Woof woof barking.