Complex sentence: The society aimed to be more successful by creating a forum where evangelicals could work together, giving overseas missions more lines of financial support and better co-ordination, including firm support against their fierce opponents who wanted unrestricted commercial and military relations with native peoples throughout the world.
Split into simpler sentences: The society aimed to create a forum where evangelicals could work together, give overseas missions financial support and co-ordination. It also advocated againt opponents who wanted unrestricted commercial and military relations with native peoples throughout the world.