1. Why did most of the Texas missions fail?

The Plains tribes resented the missionaries and their intrusion on their hunting grounds. The missions were isolated and often lacked the supplies and people to survive.

Explanation:

Coolidge was  supporter of isolationism but he wasn't totally consistent in it. from one hand he didn't support joining league of nations by u.s but from the other he was initiator of kellog-briand pact which supports world peace. coolidge did not recognize soviet union and was only u.s president who visited cuba before barrack obama