Deal! I'll speak for all capitalists and "the ruling classes":
1. Our bad! I don't think this is entirely attributable to capitalists and "the ruling classes" (which is a human institution that goes back to the dawn of civilization) but no problem! Also, some might consider the USSR's domination of various SSR's to be colonialism. Some might.
2. Isn't this the crux of the matter? Oh well, we all apologize for it. There have never been gratuitous privileges given to the political ruling class in socialist-aspirant countries though I am sure.
3. Hey, we fixed this didn't we? Oh well, bad mistake.
4. I thought we fixed this too? Sorry!
5. Children in coalmines...well, we eventually put them in school to better serve the economy! So, it was a mistake to have them lifting coal with their tiny little hands.
6. We apologize

7. Probably went a bit overboard. We should've shown as much control as the socialists did in combating perceived enemies of the state

8. Slavery was inefficient anyway. Please accept our apology!
9. I swear us capitalists and "the ruling classes" just love wanton war. McKinley should be tried for war crimes. Sorry!
10. We didn't mean anything by it!
11. Starvation is our greatest sin, solely attributable to capitalists and "the ruling classes". We apologize.
12. Racism is intrinsically capitalist. We should all be ashamed.
13. Don't we have unions now? Really powerful unions? Oh well, apologiez
14. LOL our bad!
15. Hey, what do you have against the Dutch? Oh well, we apologize for Flanders.
16. Trench warfare is a truly capitalist creation. Socialist armies move inexorably forward swelled with the pride of the revolution. Apologies.
17. Socialists prefer Ketchup Gas and it is clear that it is superior. Capitalist mustard gas is a bourgeois invention made to keep Flanders down! Apologies.
18. The USSR won WW2 and did not even build a plane! Truly amazing. Capitalist aerial bombing is the strategy of cowards. Apologies.
19. Wouldn't Soviet intervention be a good thing? Oh well, I shouldn't question socialist sensibilities. Apologies.
20. Freaking capitalist Turkish . .. .. .. .. .. .. .s. If they were socialist, they would have lived side by side and held hands with their Armenian brothers! Apologies.
21. Hey, I already apologized for mustard gas! Oh well, apologies for the rest of chemical weaponry. The Soviets had no choice but to mass stockpile chem weapons to keep up with warmongering capitalists.
22. Fascism doesn't even have any fancy books. Useless. Our apologies!
23. The free market solves everything! Except Depressions LOL, sorry!
24. Are we apologizing for the hunger marches or for hunger itself? Well I'm sorry we forced them to go marching.
25. Only capitalists could possibly be as rasist as the Nazis were. They threw off their socialist roots in the name of spreading capitalism far and wide. Apologies.
26. Franco was a hero of capitalists and "the ruling classes", but the Republic was the hero of the people! Apologies.
27. Socialist countries spread their doctrine without the use of an army! Capitalists did so solely by gunpoint. I apologize for militarism!
28. The Capitalist invention of lung disease is truly sickening. I apologize.
29. The USSR never had horrible radiation accidents, unlike the USA who nuked children and watering holes to maximize the damage. Apologies.
30. The Massacre of Nanking never would have happened if Japan was spreading it's socialist doctrine to it's capitalist neighbors in China! Apologies.
31. Well, I already apologized for fascism and Nanking and...oh well, SORRY!
32. Belsen was bad. Sorry.
33. Dresden was definitely disproportionate to what the rest of WW2 dictated! I know the Soviets never enacted wholesale destruction nor any other Socialist country! Apologies, deeply.
34. Only a capitalist society is capable of rasism and there was no rasism to be found in a socialist country. Only a rasist can not see this. Apologies.
35. The only good Italian is a cooking Italian! Sorry, that's just my capitalist rasism talking. Sorry for the mob!
36. The USSR definitely never would have sought a nuclear program unless the capitalistas had done it first. Advanced capitalist science of course can only be applied to weaponry and death! Apologies!
37. But the North invaded....uhh, I mean, sorry!

38. Even the bugs in socialist countries find themselves swept up in revolutionary fervor! In capitalist society, they must be killed out of existence, just as every other capitalist enemy! Apologies.
39. McCarthy was an enemy of the people. Apologies.
40. Whoopsies!
41. The Socialists never constructed blacklists of state enemies, yet the capitalists list were so thorough they even had blacklists of who could work in a factory! Apologies.
42. Apologies for that.
43. Shame! We sincerely are sorry.
44. No one is poor in a socialist society! Apologies.
45. I already apologized for militarism, WW1, AND WW2 but I suppose I can find it in my cold, dark, capitalist heart to apologize for the arms race too. The Soviets merely borrowed the weapons their own people selflessly built out of the kindness of their hearts for the state. Apologies.
46. If the state grants you a face, you should be happy with it! Apologies for plastic surgery.
47. The electrical chair was a purely capitalist convention, to exploit the criminal so he would....work for his...execution? Apologies.
48. The industrialization of the capitalist world has ruined our world! Good thing the socialist nations have never embarked on hazardous crash industrialization with little regard for the environment! Phew! Apologies.
49. Sorry!
50. The Greeks to this day despise capitalists, they are just waiting for the moment to burst into revolution. Apologies.
51. We
52. are
53. so
54. very
55. really
56. sorry
57. about
58. that.
59. Saddam Hussein was a true socialist, destroying the bourgeois oppression in Kuwait! Apologies.
60. Us capitalists can't get enough human body parts. Especially through illegal back channels. They uh...get 100 miles to the gallon. Apologies.
61. There has never been malnutrition in a socialist-aspirant country! Apologies.
62. Environmental disasters, as covered before, are exclusive to capitalist countries. Apologies.
63. Every tree is sacred in socialist societies! Also, capitalism never values forestation as an alternative to deforestation even though it guarantees future business for loggers. Apologies.
64. Well, I already apologized for the mafia but I suppose I can apologize for all organized crime that has ever existed as well.
65. Capitalist sucktitude has led our people to sniff rocks! Truly saddening. We apologize.
66. Tuberculosis gives revenue to the hospital bourgeois, this is why capitalists invented and spread it. Apologies.
67. Well, I already apologized for environmental degradation but I don't see why I can't throw the ozone layer in there too! Apologies.
68. Cancer is a capitalist invention, through the carcinogens of industry that, we have established, socialist societies have never valued. Apologies.
69. Sincerest apologies for all that mess!
Okay, your turn!