I believe it is the number of electrons
Wilson is suggesting that the day for spreading a nations influence as well as its size is long behind, stating that the prime time for the United States to spread influentially in Europe is no longer there. Or in another case no European nation should be able to spread conquest across the continent and that they had their chance. thats the best i can think of hope this helps
Before the arrival of the Europeans, the Caribbean islands were settled by "<span>B. the Arawak and the Carib," since after the European's arrival many of these Natives were killed. </span>