It does seem that Lennox's approach to counter prevailing 'assumptions', is possibly making headway. I use the word assumptions but Lennox is too clever for that. No doubt he has foremost in mind this verse. Matthew 10:16 ¶ Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves.
If you have not followed the work he has done and possibly still does worldwide you are missing some great, I don't know how to put it, dethroning, possibly of prevailing secularist and likely atheist ideas. My sense is that he is too modest to say this, but seems he is attempting to cut the head off of the snake.
You tube has quite a few videos of his presentations and it does seem that he entices the listeners to consider a change of 'heart'