Here’s one opinion re Calvinism & altruism:
“Total depravity does not mean that people have lost part of their humanity or are ontologically deteriorated. Just as Adam and Eve were created with the ability to not sin, people retain that essential ability to either sin or not sin, even though some properties of their humanity are corrupted.[17] It also does not mean that people are as evil as possible. Rather, it means that even the good which a person may intend is faulty in its premise, false in its motive, and weak in its implementation; and there is no mere refinement of natural capacities that can correct this condition. Thus, even acts of generosity and altruism are in fact egoist acts in disguise. All good, consequently, is derived from God alone, and in no way through humanity.[18]”
“…It is important to understand the scope of the “total depravity” of humanity in order to understand the Calvinist-Arminian debate. As noted, both views embrace total depravity; it is a question of the action which they believe God must take to reach humanity in its fallen and depraved state. May God grant to humanity the grace to respond to God’s offer of salvation, so that all may believe (as Arminius taught)? Or must God’s grace be irresistible in order to reach humanity (as Calvin taught), so that it is impossible for anyone to be saved unless God first extends to them His irresistible grace? Stated in this manner, there is no substantial difference in total depravity as embraced by Calvinists and Arminians; both agree that humanity is in a state of depravity which prevents them from responding to God. Rather, the two groups have a different belief in the grace which God extended to humanity in response to total depravity. Calvin taught Irresistible Grace; Arminius taught Prevenient Grace.”