Question

ایده ها باید متناسب با نیاز جامعه ی امروز باشه ، در غیر اینصورت تعارض بوجود میاد.

Answer 1

Ideas should be in line with (be proportionate to, meet, address) the needs of today's society, otherwise conflicts/disagreements would arise. 

Answer 2

The ideas must be according to the current needs of the society. Otherwise, it would cause a conflict.

تعارض
disagreement/ conflict/ difference of opinion/clash/ collision/ discord