I had one son in the first Gulf war, in the Falklands, in Belize and both he and his brother were sent to NI in the troubles, one in plain clothes so as not to be recognised as he was in intelligence. Did I worry............of course, especially as I had only a matter of months before lost their father. But......they were grown men, they chose their career, they loved it and were happy. I was and still am, though they are in their 50's now, immensly proud of them. I think the British people try to do what is right, without wondering what the rest of the world thinks. As for the days of the British empire, yes the British made horrendous mistakes, but so too in history did Rome, Turkey, France, Portugal, Spain......we were not the only ones...........we are only human. But we also, and this is often forgotten, did a great deal of good. The Commonwealth countries for the most part are ex-colonies............if we were as bad as all that they would have wanted no close ties with us. I believe the UK foreign aid budget is still the highest in the world, but please correct me if I am wrong. As for ISIL, what would have happened if we had stood by and let Hitler run riot over all of us? Please don't forget that for a year Great Britain stood alone agaist him, and many many people from the "colonies" that we had done such wrong to, came here and fought with us. Hitler tried to exterminate all the Jews, the gypsies, amd other ethnic minorities he considered undesireable. ISIL is slaughtering anyone who does not suscribe to their view of what being a muslim is. I really don't see too much difference.
As for being a World power, yes I think we are, we may not have the greatest number of men in the forces, so America outnumbers us there......but one son once remarked to me that it took 8 American personnel to do what 2 Brits did! He should know he was in the Gulf at the time. There is a saying, "she be small but she be mighty"......Thats Britain.
Margaret