Conflicts in europe tended to be based on all of the following except:
a. territorial expansion
b. alliance system
c. control of trade
d. failure to pass treaties

the social historical theory explains the creation of the varnas, jats and of the untouchables. according to this theory, the caste system began with the arrival of the aryans in india. the aryans arrived in india around 1500 bc. the fair skinned aryans arrived in india from south europe and north asia.

1.) irish.

2.) settlers could obtain cheap land nearby

3.) steam engine

explanation: