How was sparta different from other greek city states?

Between the world wars eisenhower's presidency the 1960s what is the organizing principle of this list?

What triggered the surge of conservative governments in central europe at the end of world war i? a. the disintegration of european families in the wake of urbanization. b. a worldwide revolutionary upsurge. c. the revival of the austrian-hungarian and ottoman empires. d. the british suppression of the indian nationalist movement. e. the killing of the tsar during the russian revolution?

Why was it difficult fpr unions to succeed in the 1800s